You have been called in to investigate a network that is actively being attacked. Computers are receiving IP addresses outside the normal scope of the local DHCP server, and upon investigating the DHCP server, you discover that all the leases available are currently used. What has most likely occurred

the answer is d underlined.

solution:

the auto-correct option of the auto-correct tool enables you to add and delete words that do not follow abbreviation rules because:

it is a feature that allows outlook to correct common spelling and typing errors and to replace characters with symbols. we can also can use auto-correct as a shortcut, which means we can type a small string of characters and have those characters replaced by a longer string.