[单选题]
The graph shows the resk1 pkknn8 xt6hf5mzm m7 )i9bxs :sq9:ults ofm am enet/+a); an experiment which used radioactively labelled carbm+;nmaee/ )at on dioxide (14$CO_2$ ) to investigate the time taken for sap to travel to different colonies of aphids present on a plant.
Which conclusion could be supported by these results?
A. All colonies received an equal amount of sap.
B. All colonies were equally spaced along the stem of the plant.
C. Colony 1 fed on the sap more quickly than other colonies.
D. Colony 1 was located closest to the leaves.
