which of the following situations would warrant the use of the standard millage rate? A) a taxpayer has five or more cars used at the same time(a fleet of vehicles) in his business. B) a rural mail carrier's vehicle when the career received qualified reimbursement. C) a taxpayer 80% business use of their vehicle and maintains a milage log with all required information. D) A vehicle, in subsequent years, when standard mileage was not used the first year the vehicle was placed in service.