Kristine is 5 1/2 feet tall. Her sister Colleen is 57 inched tall. Which of the following is true of their height?

A.kristine is exactly 8 inches taker than Colleen

B. Kristine is exactly 9 inches taller than Colleen

C.colleen is exactly 8 inches taker than Kristine.

D. Colleen is exactly 9 inches taller than Kristine.