the answer is D
since you can't have a radical in the denominator you must multiply the top and bottom by square root of 3 so then you have on the top 6 and square root of 2* square root of 3 and on the bottom just a normal 3
then you multiply the 2 and 3 together to get square root of 6 so then you have 6 square root of 6 divided by 3
then you can simplify the 6 on top with the 3 on the bottom and get your final answer as 2 square root of 6
