To delete sample data in the datasheet's columns or rows, select the cells, then press the ________ key.

The NPER

A) is a word or a string of characters that represent one or more cells. B) a set of range names. C) is the total number of payment periods. D) the present value of the loan.

Many systems, including MS-Windows, support the use of ____________, which are short sequences of characters that appear at the end of filenames and are preceded by a period.

a. filename extensions b. pragmatic identifiers c. binary indices d. run time signatures