If a and b are two digit numbers that share the same digits except in reverse order, then what is the sum of a and b ?
I) a - b = 45
II) The difference between the two digits in each number is 5

A

if the statement I alone is sufficient to answer the question.

B

if the statement II alone is sufficient to answer the question.

C

if both the statements I and II are sufficient to answer the question but neither statement alone is sufficient.

D

if both the statements I and II together are not sufficient to answer the question and additional data is required.