Help please! I don't understand this question. Can you guys please help?

A carnival has two payment options. Plan A, you pay $10 admission plus $3 for each ride. Plan B, you pay a $20 admission plus $1 for each ride. Write an inequality that would express the situation where plan B is the best buy.
A) 20x > 10 + 3x
B) 20x < 10 + 3x
C) 20 + x < 10 + 3x
D) 20 + x > 10 + 3x