For the positive integers a, b, and k, aᵏ || b means that aᵏ is a divisor of b, but aᵏ⁺¹ is not a divisor of b. If k is a positive integer and 2ᵏ || 72, then k is equal to Select one of the following answer choices A 2 B 3 C 4 D 8 E 18 Submit Log in or register to post comments