Answer:
I will accept 3 lollipops for 1 candy bar.
Explanation:
3 candy bars can be traded for 2 pieces of pizza, and 1 piece of pizza can be traded for 4 lollipops.
Given that
3 candy bars = 2 pieces of pizza, that is
1 piece of pizza = 1.5 candy bar
Also given
1 piece of pizza = 4 lollipops
1.5 candy bar = 4 lollipops

1 candy bar = 2.67 lollipops ≅ 3 lollipops
So I will accept 3 lollipops for 1 candy bar.