The woman, who has been missing for 10 days, is believed _____.a.to be abductedb.to be abductingc.to have been abductedd.to have been abducting

The correct answer is c. "to have been abducted".

Here's why:

a. "to be abducted" - This is in the present tense, suggesting the action is happening now, which doesn't fit the context of the sentence.

b. "to be abducting" - This suggests that the woman is currently abducting someone, which is not the intended meaning.

c. "to have been abducted" - This is in the past perfect tense, suggesting the action happened at some point in the past and is now over. This fits the context of the sentence, as the woman has been missing for 10 days.

d. "to have been abducting" - This suggests that the woman was in the process of abducting someone in the past, which is not the intended meaning.