A large box contains 15 small boxes and each small box contains 20 chocolate bars. How many chocolate bars are in the large box?	Choose the correct option:	A) 220	B) 490	C) 380	D) 300	E) 690

Rationale: "the only thing you have to do is a simple multiply we have : 15 * 20 = 300 correct answer is : d ) 300"
Answer: D