Using the following code segment:

Queue $$ Character $>q=$ new Queue ;

q$.$enqueue $(\text{'}$A$\text{'})$;

q$.$enqueue $(\text{'}$B$\text{'})$;

q$.$enqueue $(\text{'}$C$\text{'})$;

q$.$enqueue $(\text{'}D\text{'})$;

ch $=q*$ getFront $()$ ;

q$.$dequeue $()$;

q$.$enqueue $(ch)$;

What is the value at the back of $q?$

A

B

C

D

E