Select the correct answer. Which function is continuous across its domain? A. f ⁡ ( x ) = { x + 6 , - 4 ≤ x < - 2 0.5 ⁢ x 2 , - 2 ≤ x < 4 20 − 3 ⁢ x , 4 ≤ x ≤ 8 B. f ⁡ ( x ) = { x − 2 , - 4 ≤ x < - 2 0.5 ⁢ x 2 , - 2 ≤ x < 4 25 − 3 ⁢ x , 4 ≤ x ≤ 8 C. f ⁡ ( x ) = { x + 4 , - 4 ≤ x < - 2 0.5 ⁢ x 2 , - 2 ≤ x < 4 20 − 3 ⁢ x , 4 ≤ x ≤ 8 D.