During 2020, a self-employed taxpayer drives her car 4,000 miles to visit clients, 3,000 miles to get to her office, and 1,000 miles to attend business-related seminars. She also spent $400 for airfare to another business (1-day) seminar and $100 for parking at client offices. Using $.575 per mile, what is her deductible transportation expense? A. $3,275 B. $5,100 C. $3,375 D. $400