It should be D.
Hope this Helps!!
"Just to clarify- for those that do not know" (I will continue in the comments)
Just looking at the answers, I can see it must be B- While the e-mail contains formal language in the body, the salutation is formatted incorrectly and the contact information is missing.
We can see at the end Marissa Lee says she will add her contact info, but it appears to be missing. In addition, the salutation needs to include the name and position of the receiver.
I hope this helps! :)
