________ text helps people using a screen reader to understand the content of pictures

Which of the following is NOT a step in a serviceable backup plan?

A. Make a system recovery drive. B. Make monthly backups. C. Activate autosave. D. Make copies of important files.

A three-tier, distributed Web application consists of _______, ________ and __________ tiers.

Fill in the blank(s) with the appropriate word(s).