The following investment return will result in what dollar weighted return? An initial outlay of $50,000, with three years of additional outflows of $10,000 each and inflows as follows: $0 the first year, $20,000 in years 2 and 3, and sale of the property at the end of the year 3 for $75,000.

a.) 27.64%

b.) 14.04%

c.) 18.32%

d.) 20.67%

Please explain.