Steve's employer sent him on a 3-day business trip to London, England. Steve stayed an extra 3 days to sightsee. Steve's travel expenses include $2,000 for airfare; $200 a night for lodging (for 6 total nights, of which 3 were for business); and $100 a day for meals (for 6 days in total). If Steve's employer does not reimburse him for his trip, what amount can he deduct as an unreimbursed employee business expense?

a. $1,900.

b. $1,750.

c. $2,750.

d. $2,900.

e. None of the above.