Please submit your concern

Explanation:

Option (a): If this were true there would have been no point of doing the experiment.

Option (b): Does not add anything significant to the findings of the experiment 

Option (c): According to the passage, species that exhibit self-control are usually social. Cuttlefish are not. But if it were true that cuttlefish exhibit sociability, you could conclude that like most other social creatures, cuttlefish, too, exhibit self-control. So if option B were true, the findings of the passage would be in line with what is generally observed. So, that way, it would complement the findings.

Option (d): If cuttlefish could not distinguish between geometric shapes, there was no reason for them to wait for the shrimp. The whole premise of the experiment is negated.

Hence, option (c).