Answer:
C. a video including a chart with medical facts
Explanation:
the other ones don't relate to what would be presented in a serious tone.
Progressive verbs use the form "to be."
"Are eating" takes the form "to be" since something is happening.
Therefore, your answer is B.
No this is not a possibility
Answer:
A group of scientists completes a study and writes it up in the form of an article.
