podle/mod/quiz/attempt.php In a linked based implementation of the ADT stack discussed in this term, which operation requires linear time O(n)? Select one: . pop O B. None O C. push O D. peek Dynamic expansion of the array means: Select one: O a. Dynamic expansion of array can't be implemented O b. The elements of existing array is copied to a larger one. O c. The elements of existing array are copied to a file with a large size O d. Increase the size of the existing array at compile time hp & 5 6