C. elegans, a nematode or "round worm," is a model organism in biology. A group of AP biology students was investigating associative learning in C. elegans.
C. elegans feeds on bacteria, a particular strain of E. coli OPI150. For one week, when students added E. coli OPI150 to the nematode culture, they also added salt ($NaCl$). Then, students placed the nematodes on a Petri dish with two choices, one mL of $NaCl$ solution and one mL of water, as seen in the image below.
Predict where the C. elegans will be located after ten minutes in this experiment, and justify your prediction.