which of the following trips, if any, will qualify for the travel expense deduction? a.dr. jones, a self-employed general dentist, attends a two-day seminar on developing a dental practice. b.paul, a romance language high school teacher, spends summer break in france, portugal, and spain improving his language skills. c.dr. brown, a self-employed surgeon, attends a two-day seminar on financial planning. d.myrna went on a two-week vacation in boston. while there, she visited her employer's home office to have lunch with former coworkers.