Refer to the Graph Showing the Locomotor Activity of Drosophila

Multiple Choice

Refer to the graph showing the locomotor activity of Drosophila melanogaster flies that have been subjected to various gene-knockout experiments. What can be inferred about the normal function of gene C in the graph?

A) Gene C inhibits or regulates locomotor behavior; when the gene is knocked out, locomotor activity is elevated.
B) Gene C has little effect on locomotor activity.
C) Gene C has no effect at all on locomotor activity.
D) Gene C interacts with gene B in controlling locomotor activity.
E) There is insufficient data to make an inference.