Which part of the passage should be revised to eliminate wordiness?

A. Sentence 9: "You immediately reason that it must be sour, like those you have already tried, because you have already determined that they were also sour."

B. Sentence 10: "If you analyze the process that has occurred in the mind, you find that you have performed the operation of induction."

C. Sentence 11: "You found that, on two occasions, hardness and greenness in apples went together with sourness."

D. Sentence 12: "This idea was tested and seen to be true in the first case, and it was confirmed by the second."

Revising it to "You immediately reason that this apple must be sour like those you have previously tried" makes it more concise while retaining its original meaning.

To eliminate wordiness in the passage, let's examine the sentences provided:

Sentence 9: "You immediately reason that it must be sour, like those you have already tried because you have already determined that they were also sour."
Sentence 10: "If you analyze the process that has occurred in the mind, you find that you have operated induction."
Sentence 11: "You found that, on two occasions, hardness and greenness in apples went together with sourness."
Sentence 12: "This idea was tested and seen to be true in the first case, and it was confirmed by the second."

By examining these sentences, Sentence 9 can be revised to eliminate wordiness as follows: "You immediately reason that this apple must be sour, like those you have previously tried." This shortened version conveys the same idea more concisely.

The correct option is A.