Answer:
D. A line graph
Step-by-step explanation:
It is because in line graphs we can easily see the increase of the height of the plants over time. The result of the experiment conducted to see how music affects plant growth will be easily interpreted using a line graph.
The student obtains four identical plants. Each one is potted in the same type of soil and receives the same amount of sunlight and water each day. Plant A listens to classical music for three hours each day. Plant B listens to rock music for three hours each day. Plant C listens to country music for three hours each day. Plant D does not listen to any music at all.