What are increment and decrement operators?

If I have multiple Read Replicas for my master DB Instance and I promote one of them, what happens to the rest of the Read Replicas?

A. The remaining Read Replicas will still replicate from the older master DB Instance B. The remaining Read Replicas will be deleted C. The remaining Read Replicas will be combined to one read replica

In the header of a for loop, which expression should not end with a semicolon?

a. initialization expression b. test expression c. update expression d. none of these