What is the antecedent of the pronoun in the sentence? Take this letter and drop it in the mailbox at the end of the street.
A The letter is the object of take . Letter in the form of the pronoun it is also the object of mail it. The letter receives all of the action in this compound sentence.
A. is correct.
B mailbox is where it is going to be placed it can be the location of the dropping and the object being dropped.
B. is wrong.
C. end is modified by street. dropping the street even the end of the street in a mailbox makes no sense.
C. is wrong
D. see above. The street is not going to be dropped in a mailbox.
D. is wrong.