If \(k\) is a positive integer, what is the remainder when \((k + 2)(k^3 - k)\) is divided by \(6?\)

[VJesus12]

If \(k\) is a positive integer, what is the remainder when \((k + 2)(k^3 - k)\) is divided by \(6?\)

A. 0
B. 1
C. 2
D. 3
E. 4

Answer: A

Source: Official Guide