Which sentence is correctly punctuated?
OA. Karlos bought a rugged, expensive, mountain, bike with his first paycheck.
B. Karlos bought a rugged, expensive, mountain bike with his first paycheck.
C. Karlos bought a rugged expensive mountain bike with his first paycheck.
D. Karlos bought a rugged, expensive mountain bike with his first paycheck.

70 points to fastest correct anwser