Answer:
The answer is the middle one or B)
Step-by-step explanation:
The answer to the question is 63, and 21 times 3 is its simplest form.
[tex]7 \sqrt{3} \times 3 \times \sqrt{3} = 7 \times 3 \sqrt{3} \times \sqrt{3} = 21 \times { \sqrt{3} }^{2} = 21 \times 3[/tex]
