Which sentence uses the underlined academic
vocabulary word incorrectly?
A. We thought the program started at
8:00, whereas it actually began at 7:00.
B. No one knew the whereas of the little
dog, who suddenly disappeared.
C. "Whereas we are met on this joyful
occasion," the preacher began, "let us
proceed."

The sentence that uses the word "whereas"incorrectly is B. No one knew the whereas of the little  dog, who suddenly disappeared.

Explanation:

The word "whereas" is used to compare or contrast with a truth or fact. It is correctly used in option A and C where it is used to compare/contrast.

The correct word to be used in option B would be whereabouts since they did not know where the dog is. Using whereas when looking for the dog does not show any comparison or contrast.

Whereabouts is used to show where something is.

the present continuous is a verb tense which is mainly used to indicates that an action is in progress at the moment of speaking.  

it is formed using: person + verb to be (am/is/are) +verb + - ing form  

example: i am studying at this moment .

in addition, the present continuous is also used in order to express things that will or will not happen in the near future.

example: i am having dinner with some friends tonight.

the speaker sometimes   uses it   to express that an action is repeated and it causes irritation on the part of the speaker

example: my sister is constantly complaining about everything.

absolutely it most certainly can.