Evaluate 3^{3}×3^{4} using the product of powers property:

(A) 3^{7}

(B) 108

(C) 3^{-1}

(D) 9^{7}

The product of powers property states that a^{m}×a^{n}=a^{m+n},

3^{3}×3^{4} =3^{7}

So (A) is the correct answer.