Tanner is choosing between two investment options. He can invest $500 now and get (guaranteed) $550 in one year, or invest $500 now and get (guaranteed) $531.40 back later today. The risk - free rate is 3.5%. Which investment should Tanner prefer? O A. $531.40 later today, since $1 today is worth more than $1 in one year. B. $550 in one year, since it is $50 more than he invested rather than $31.40 more than he invested. C. Neither both investments have a negative NPV. D. Tanner should be indifferent between the two investments, since both are equivalent to the same amount of cash today