Erin uses her personal car for her environmental remediation consulting business and put $25,000$ miles on it last year, $5,000$ of which were for personal use. How much of the cost of operating the car would Erin be able to deduct as business expenses?a$.$ $$1\mathrm{.}50$ per business mile.b$.51$ cents per business mile.c$.100\%.$d$.80\%.$