Explanation
The correct option to fill in the blank is:
C) wanted
Explanation: In this sentence, the verb "asked" is in the past tense, and it is followed by a reported speech (what I...). When reporting someone's words or a question in the past tense, we typically shift the verb tense back one step. Therefore, the correct verb form to use is "wanted," which is the past tense form of "want." Option A) wants (present tense) and Option B) have wanted (present perfect tense) do not fit the past tense context of the sentence. Option D) did want (past tense of "do want") is not necessary in this case, as the past tense form of "want" is sufficient.