The expression \( 5 - \sqrt{3} \) isn't directly represented by a rational exponent, but if you're specifically looking to express \(\sqrt{3}\) using a rational exponent, you can do so as follows:
The square root of \(3\) can be expressed as \(3^{1/2}\).
However, if we look at your options, it seems they might not relate directly to rewriting \(5 - \sqrt{3}\) as a rational exponent. If you only need to rewrite \(\sqrt{3}\) in a rational exponent form, the answer should be \(3^{1/2}\).
If the intent was different or if your question aimed to rewrite something else entirely that wasn't properly captured here, please clarify.