Study the following algorithm. The instruction "Turn a card over" appears twice. Why does it appear the first time, before the loop structure?

Set count to $1$

Turn a card over

WHILE $($card $!=$ Jack$)$

Add $1$ to count

Turn a card over

ENDWHILE

Display count

Question $7$Answer

a$.$

This ensures that the loop condition has a card to test the very first time.

b$.$

This alerts the program the loop is an event$-$controlled loop.

c$.$

This ensures that the loop does not run past the last card in the pack.

d$.$

This is not required for the algorithm to work correctly $-$ it helps the user understand what to do$.$