I believe the answer would be D: a current study on the effects of stress on the body published by a medical journal.
Hope this helps.
Personally, I would phrase it like this:
The choir moved the audience to tears with their beautiful voices.
The answer is A. the tulips were bright slashes of color like a child's crayon drawing.
He found his next door neighbor was funny and friendly.
"Use an appropriate level of formality."
Questions and disagreements are allowed to happen in effective interactions. However, formality is very important for effectiveness.
