SAT math practice question: Roots and fractional exponents

 
Try the following SAT math practice question (No Calculator) that tests your ability to simplify and manipulate arithmetic terms with roots and fractional exponents.

Which of the following is equivalent to $(\sqrt[3]{48})(\sqrt{54})$ ?

1. $\quad 6 \sqrt[6]{6^5}$
2. $\quad 6 \sqrt[5]{6^6}$
3. $\quad \sqrt[6]{6^{11}}$

1. $\quad \textrm{I only}$
2. $\quad \textrm{III only}$
3. $\quad \textrm{I and III only}$
4. $\quad \textrm{II and III only}$