Select the correct answer.

Which expression is equivalent to the given expression?

[tex]\[ \sqrt{45} \][/tex]

A. [tex]\[3 \sqrt{5}\][/tex]

B. [tex]\[9 \sqrt{5}\][/tex]

C. [tex]\[5 \sqrt{3}\][/tex]

D. [tex]\[5 \sqrt{9}\][/tex]