When are you legally allowed to pass another car on the right?

Answer: B — When the other car is signaling a left turn

Passing another car on the right can be dangerous and is typically only allowed under certain circumstances. A is incorrect because passing on the right is only allowed on multi-lane highways where the left lane is designated for passing slower vehicles. C is incorrect because passing on the right is only allowed on multi-lane highways where the left lane is designated for passing slower vehicles. D is incorrect because passing on the right is typically only allowed when the other car is signaling a left turn, as it indicates that they will be turning off the road soon and it is safe to pass on the right. Therefore, B is the correct answer as it is the only option that provides a specific and valid scenario for passing on the right.