The expression \( 5 - \sqrt{3} \) can be rewritten using a rational exponent. The square root can be expressed as an exponent of \( \frac{1}{2} \).
So, \( \sqrt{3} \) can be rewritten as \( 3^{1/2} \).
However, in terms of the given question which focuses on the rewriting of \( 5 - \sqrt{3} \) itself, none of the options directly represent the expression appropriately.
If you meant to rewrite just \( \sqrt{3} \) using a rational exponent, then it would be \( 3^{1/2} \).
If the intention is indeed to rewrite the entire expression \( 5 - \sqrt{3} \) using a rational exponent, the appropriate answer isn't provided in the options you've given.
If we're strictly choosing from the provided options without any modifications, I'd recommend checking the problem statement again for accuracy, or match the question with the respective correct expression if it was meant differently. Could you clarify if you're looking for just the square root or a different expression?