Answer:
Before A:

A:Already Simplified!
B:Also, Already Simplified! Can be changed to

C:Already Simplified, yet again. Can be changed to

D:Already Simplified.
Explanation:
For Before A, I multiplied both denominator and numerator by square root of 3. The multiplication moved the square root to the numerator, simplifying the fraction.
The different forms of B and C are just that I multiplied the square of the first number into the square roots. This is OK because the square root of a number's square is the number itself. Therefore, you can multiply a square root by the square of the number from outside the root.