In addition to using images on your Web pages, you can use images as a table or CSS layout block ____________________.

The initial D in DSUM indicates to Excel that:

A) the function calculates a double-precision value. B) a data filter must be used. C) a database range will be used in the function instead of a single column or row of numbers. D) the function will be performed on the data in column D.

extern

a) is a keyword to indicate that a variable is defined in a different file b) is used to access command-line arguments c) can be used as a control structure d) is a data type