Critical Reasoning: "Complete the Argument" Format

Which of the following most logically completes the argument?

Since the creation of the personal computer in the late 1970s, the general population has learned a great deal about computing, and electronic engineering, in general. Still, the knowledge of the average consumer does not enable an accurate analysis of a specific computer and its internal components for the purpose of making a wise purchase. It follows that many companies selling computers are capable of exploiting this lack of knowledge because __________.

Incorrect.

This answer choice neither strengthens nor weakens the conclusion and, therefore, cannot logically complete the argument. The pricing of almost everything is affected by trends in the market. The fact that the manufacturers of internal components follow these trends has nothing to do with the knowledge of consumers.

Incorrect.

This answer choice weakens the conclusion and therefore cannot logically complete the argument. If the average consumer has access to expert advice, then companies cannot utilize the consumer's lack of knowledge.

Incorrect.

This answer choice weakens the conclusion and therefore cannot logically complete the argument. If most people are concerned with how a computer functions, then most people are interested in its internal parts. Therefore, it is unlikely that companies will be able to exploit their ignorance on this issue.

Incorrect.

This answer choice weakens the conclusion and therefore cannot logically complete the argument. If misinformation has been minimized, then more people now know the truth about which type of computer to buy. Therefore, companies will not be able to utilize lack of knowledge.

Terrific!

This answer choice strengthens the conclusion and therefore logically completes the argument. If consumers can't tell how good a component is, companies can sell low-quality components at standard or high prices and make a buck by cutting down their production costs.