Please explain

A company is considering 2 different ways to spend an extra $25,000 cash until it is needed in 7 years. The central bank is anticipating an average inflation rate of 2% annually for this time period. The first option is an investment with a real annual MARR at 6%, subject to a 26% tax rate. The second option is to buy the equivalent value of gold (assume 0% inflation) to sell in 7 years. Question 41 (1 point) If the given MARR of 6% is the before-tax MARR, what is the actual after-tax MARR? ( a) 6.5% Ob) 8.1% c) 4.4% O d) 44%