A attack uses software to try thousands of common words sequentially in an attempt to gain unauthorized access to a user's account. Trojan horse dictionary web bug denial-of-service

  to change the number of rows and columns displayed by the excel object a. select the object and drag a size handle on the active object. b. deselect the object and drag a size handle of the object. c. deselect the object and drag a row or column divider of the object. d. select the object and drag a row or column divider on the active object.