All of the Following Are Allowed a "For AGI" Deduction

All of the following are allowed a "for AGI" deduction except:

A) Cora owns her own CPA firm and travels from Lafayette,LA.to Washington,D.C.to attend a tax conference.
B) Jennifer,who lives in Houston,is the owner or several apartment buildings in Salt Lake City and travels there to inspect and manage her investments.
C) Alan is self-employed and is away from home overnight on job-related business.
D) Alison is an employee who is required to travel to company facilities throughout the U.S.in the conduct of her management responsibilities.She is not reimbursed by her employer.