Abus leaves a bus station and picks up two people at the first stop . at the second stop , the bus picks up three more people . at the third stop, all of the passengers get off the bus . emma sketched the graph below to represent the situation.

what error did emma make in her sketch ?

a) her sketch should not include horizontal lines

b) her sketch should have curves instead of lines .

c) her sketch does not show the correct number of stops .

d) her sketch shows the number of people decreasing and then increasing.