Which data structure is appropriate to store customers in a clinic for taking flu shots? A. Stack B. Queue C. Priority Queue D. Array List E. Linked List In the implementation of MyStack and MyQueue, which of the following are true? A. MyStack contains all the methods defined in MyArrayList. B. MyQueue contains all the methods defined in MyLinkedList. C. MyStack contains an array list for storing elements. D. MyQueue contains a linked list for storing elements