To count or not to count

[Nevadaref]

A1 ends his dribble in the frontcourt and B1 begins closely guarding him. When the count reaches three, A1 tosses the ball straight up in the air (10 feet high) and without moving either foot is able to catch the ball when it comes back down. How does this effect the five-second count?

Should the official:
a. continue to count the entire time
b. suspend the count during the toss, but continue from 3 on the catch
c. start a new five-second count on the catch