Write each expression with a rational exponent. (square root of 7 a end root)to the power of 5 (SQRT7a)^5

A. (7 a)to the power of 5 over 2 end exponent (7a)^5/2

B. (7 a)to the power of 1 half end exponent (7a)^1/2

C. (5 a)to the power of 3 over 4 end exponent (5a)^3/4

D. a to the power of 3 over 2 end exponent a^3/2