Select the option that must replace the part of the sentence in bold, so that the sentence is grammatically correct.

She did not knew the answer to the question asked by the teacher.

Option A is the correct answer. The phrase "did not knew" is incorrect because the auxiliary verb "did" already carries the past tense, so the main verb "knew" must be in its base form "know".

Option B: Incorrect because "did not" requires the base form "know," and adding "about" unnecessarily changes the meaning.
Option C: "Does" (present tense) cannot pair with "knew" (past tense). It should be "does not know."
Option D: "knows" (present tense) cannot follow "did not," which requires the base form "know."