Let N denote the set of natural numbers. Define

$$A = \left\{ x \mid x = 4n, n ∈ N\right\} and B = \left\{ x \mid x = 6n, n ∈ N\right\}$$ then $$A \cap B = $$

A

$$\left\{ x \mid x = 24n, n ∈ N\right\}$$

B

$$\left\{ x \mid x = 12n, n ∈ N\right\}$$

C

$$\left\{ x \mid x = 2n, n ∈ N\right\}$$

D

The empty set