You have purchased a condo and are financing a mortgage of $325,000 over 20-years with monthly payments. Your mortgage rate is quoted as APR 7.25% compounded semi-annually. After 5 years you make a lump sum payment of $50,000 towards your mortgage principal and continue with your regular payments. By approximately how many years will it reduce the amount of time taken to pay off the mortgage?

A) 4 Years

B) 2 Years

C) 6 Years

D) 3 Years

E) 5 Years