HBR Accounting Hired Denise,to Negotiate a Real Estate Deal but Wants

HBR Accounting hired Denise,to negotiate a real estate deal but wants to keep their name out of the deal until after the closing.Which statement is correct?

A) Denise is an agent and has no liability on the deal.
B) Denise is an agent but has a duty to disclose her principal if asked.
C) Only Denise is liable on the deal
D) Denise shares liability on the deal because HBR is an undisclosed principal