Consider the following relation:

Recipe (rid: int, name: varchar(40), time: int, difficulty: int)

Assume the presence of a clustered index idx1 on rid and an unclustered index idx2 on time.

A. Give an example of an update query that would be significantly speeded up by idx1

B. Give an example of an update query that would be significantly speeded up by idx2

C. Give an example of an update query that would be significantly slowed down by idx1 or idx2

D. Give an example of an update query that is not impacted by idx1 or idx2