Critical Reasoning

Authors writing detective stories frequently include a brilliant detective and an incompetent investigator who embark on separate paths in an attempt to solve a crime. The separate accounts frequently consist of the incompetent investigator becoming distracted by the criminals' well-planned attempts and the competent detective solving the case after a violent confrontation. Many literary analysts believe authors often choose this storyline in an attempt to provide readers additional complexity and challenge in solving the investigation.
Which of the following most logically follows from the statements above?

A) A well-written detective story consists of an investigation being undertaken by a competent and incompetent investigator.
B) Some authors use an incompetent investigator to show the complexities of an investigation.
C) Authors never write stories with incompetent investigators who solve a case correctly.
D) Authors can use the separate investigative accounts to make predicting the correct outcome of the investigation more difficult.
E) Authors write stories with competent and incompetent investigators to show the complexity of real life.

Can some Experts explain logically?

OA D

EconomistGMATTutor wrote:This question asks you to draw a conclusion from the given evidence. The correct choice MUST be true.

Choice A: This choice states that there is only one way to construct a "well-written detective story." This cannot be concluded from the argument.
Choice B: This one might tempt you. Some authors DO use an incompetent investigator. However, the passage does not say that this is done to "show the complexities of an investigation." Using both an incompetent and a competent investigator is done to provide complexity to the reader in solving the investigation.
Choice C: This is too definite a claim. Never? The passage uses the term "frequently," not "always."
Choice D: This is the correct choice. Notice the less definite wording, which is often found in the correct choice in inference questions. Yes, authors CAN use
separate investigative accounts to make predicting the outcome more difficult. This is is virtually a paraphrase of the last sentence of the passage.
Choice E: Real life is not mentioned in the passage.

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