Including statements in a program to check for improper data during execution of the program is known as __________ programming.

Parts of a worksheet can be hidden by:

A) using a table array. B) using locked cells with formulas. C) NOT allowing these cells to be printed. D) using format definitions for cells.

____________ are spaces that appear at the beginning of a string.

a. Leading spaces b. Empty spaces c. Indentations d. Tabbed spaces