Which shows another way to write 7^5?

A. 7 × 7 × 7 × 7 × 7
B. 7 + 7 + 7 + 7 + 7
C. 5 + 5 + 5 + 5 + 5 + 5 + 5
D. 5 × 5 × 5 × 5 × 5 × 5 × 5