46. Assume that a variable will need to store only integers in the range of 1 through 20000. The most efficient data type for the variable is _____

A. character
B. float
C. integer
D. long integer
E. short integer

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47. Which of the following is true?

A. iostream is derived from istream
B. iostream is derived from ostream
C. ostream is derived from iostream
D. ostream is derived from istream

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