When Using IM for Business Communication,acronyms Such as FWIW and HTH

Multiple Choice

When using IM for business communication,acronyms such as FWIW and HTH

A) are perfectly appropriate.
B) may confuse some readers, who are new to the medium but meet the expectations of most.
C) should be used frequently since they indicate your comfort with the medium.
D) should not be used unless you are communicating with close colleagues.
E) are inappropriate for U.S. audiences, but fine for international readers.