Which of the Following Describes the Similarities of Memos and Emails

Which of the following describes the similarities of memos and emails?

A) Memos and emails are both typically sent only to internal audiences.
B) Memos and emails have very little in common.
C) Unlike emails,memos should address multiple topics.
D) Like emails,memos should include complimentary closings and signatures at the end.
E) Memos are often longer than the recommended length for emails.