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Sentence Correction: Redundancy - "as well as"

John, as well as Jane, are nice, hard working and tall.

Good! And and as well as have the same meaning, so using the single word and is more concise than using the three-word phrase as well as

This answer choice is grammatically incorrect. The singular subject John does not agree with the plural verb are

Remember that only and makes a subject that consists of several singular nouns a plural subject:

x and y + plural verb. The subject is x and y
Example: John and Jane are happy together.

x as well as y - the verb is singular if x is singular, plural if x is plural
Examples: John, as well as Jane, is abroad.
               Many doctors, as well as nurses, are attending the conference.  

In addition, this answer choice is stylistically flawed. Using as well as instead of and is redundant.

What helps us identify this mistake is the following Stop Sign:  

as well as

While this answer choice is grammatically correct, it is stylistically flawed. Using as well as instead of and is redundant.

What helps us identify this mistake is the following Stop Sign:  

as well as

Did you go over all five answer choices before choosing this one? 

The lesson to be learned here is not to automatically choose the first answer choice that corrects the original mistake. Remember that in Sentence Correction questions, we do not choose a correct answer but rather eliminate four incorrect answer choices and choose the last one standing. 

After eliminating answer choices that repeat the original mistake, you have to go over all the remaining answer choices carefully and compare them word for word. This is the only way you'll be able to correctly eliminate all but one of them.  

While this answer choice is grammatically correct, it is not the best of the five answer choices. There is another answer choice which is also grammatically correct and which is stylistically better - that is, more concise - than this one.

While this answer choice is grammatically correct, it is stylistically flawed. Since also means the same as and, using them both is redundant

Good! That's what you should have done.

John, as well as Jane, are
John, as well as Jane, is
John and Jane are
John, as is also Jane, is
John and also Jane are
Yes
No