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Sentence Correction: Pronoun Questions - One

There is so many career options provided by the huge variety of educational facilities that it is sometimes difficult for one to stay focused on one's personal goals.

This answer choice is grammatically incorrect. The plural subject many career options does not agree with the singular verb is

What helps us identify this question as a Subject Verb Agreement question and identify the mistake is the following Stop Sign

The verb precedes the subject  

This answer choice is grammatically incorrect and repeats the original Subject Verb Agreement error. The plural subject many career options does not agree with the singular verb is

What helps us identify this question as a Subject Verb Agreement question and identify the mistake is the following Stop Sign

The verb precedes the subject  

Although this answer choice corrects the original Subject Verb Agreement error by replacing is with are so that the verb agrees with the subject career options, it is grammatically incorrect. The pronoun his can refer to human male nouns, but there's no such noun in the sentence.

The pronoun one agrees with itself only.

What helps us identify this question as a Pronoun question as well as identify the mistake is the following Stop Sign:

Every pronoun in the underlined part of the sentence or after it

Although this answer choice corrects the original Subject Verb Agreement error by replacing is with are so that the verb agrees with the subject career options,, it is grammatically incorrect.The pronoun their refers to one but does not agree with it as one is singular and their is plural.

The pronoun one agrees with itself only.

What helps us identify this question as a Pronoun question as well as identify the mistake is the following Stop Sign:

Every pronoun in the underlined part of the sentence or after it

Good job!

This answer choice corrects the original Subject Verb Agreement error by replacing is with are so that the verb agrees with the subject career options.

There is so many career options provided by the huge variety of educational facilities that it is sometimes difficult for one to stay focused on one's personal goals
There are so many career options provided by the huge variety of educational facilities that it is sometimes difficult for one to stay focused on their goal
There are so many career options provided by the huge variety of educational facilities that it is sometimes difficult for one to stay focused on his goal
It is sometimes difficult for one to stay focused on one's personal goals because there is so many career options provided by the huge variety of educational facilities
It is sometimes difficult for one to stay focused on one's personal goals because there are so many career options provided by the huge variety of educational facilities