If M1 = 25 × 36 × 72 × 55, M2 = 23 × 35 × 74 × 5 and M3 = 27 × 32 × 7 then what is the greatest common denominator of M1, M2, and M3?1. 23 × 34 × 742. 23 × 32 × 723. 23 × 33 × 724. 23 × 32 × 7

• A. 1
• B. 2
• C. 3
• D. 4