Question: 9 . The cost for accessing the k - th element in a vector is constant time because A . the vector stores data as

9. The cost for accessing the k-th element in a vector is constant time because
A. the vector stores data as a linked list
B. the vector never needs to scan more than k nodes to find the k-th element
C. the vector class stores data as an array
D. the vector class usually maintains an index

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