A Friend Tells You That He Conducted a Scientific Experiment

Multiple Choice

A friend tells you that he conducted a scientific experiment this summer in which he talked to ten plants and measured their growth.He found that these plants grew faster and taller than any plants he had ever grown.From your friend's research, can we conclude that talking to plants is the cause of their fast growth?

A) Yes, because the scientific data was collected.
B) Yes, because a positive correlation would found between talking and plant growth.
C) No, because the placebo effect was not considered.
D) No, because there was no control group.