You will come, __________
Rule: Positive statement → Negative question tag; Negative statement → Positive tag.
This is a question tag. When the main clause is positive ("You will come"), the tag is negative ("won't you").
Checking:
- (a) "won't you" → correct negative tag.
- (b) "will you" → would be correct only if the statement was negative.
- (c) "shouldn't you" → incorrect auxiliary.
- (d) "aren't you" → wrong auxiliary. \[ \boxed{\text{won't you}} \]
Apply the question-tag rule mechanically: identify the auxiliary verb in the main clause and its polarity, then match the tag's auxiliary and opposite polarity, rather than judging the options by feel.
Only option A correctly matches both the auxiliary "will" and the required flip in polarity.
Hence, the correct answer is won't you.