When you derive a class from an existing class, you _

A can add new functions, but cannot add new data

B must add both new data and new functions

C can add new data, but cannot add new functions

D can add both new data and new functions

to locate a value in an ordered array of 50 items, binary search must examine at most _ values

A.. 6

B. 10

C. 25

D. 50