The correct answer is: A. Didn’t understand
The accused pretended that he didn’t understand the lawyer’s question. This is because he did not want to answer the question, or because he did not want to admit to something that he had done.
The other options are incorrect because they do not accurately reflect the accused’s state of mind. Option B, hasn’t understood, suggests that the accused did not understand the question at the time it was asked. However, the accused is pretending that he does not understand, so this is not the case. Option C, doesn’t understood, is the past participle of the verb to understand. However, the accused is pretending that he does not understand, so this is also not the case. Option D, wouldn’t understand, suggests that the accused is incapable of understanding the question. However, the accused is pretending that he does not understand, so this is also not the case.