rning Portal on 5 the main difference between stack and queue data structures is ____? answered out of 1.00 Select one: O a. in stack we can retrieve only the last element stored, while in the queue we can retrieve the first element stored only. question O b. in stack we can remove only the first element stored, while in the queue we can retrieve the first element stored O c. in the stack and in the queue we can retrieve only the last element stored O d. in both data structures we can remove the first element stored only cion 6 Using double ended queue we can implement the Stack ADT answered Select one: d out of 100 O True question O False O 1 C 00