C is:

Do not try to weaken the penguin by suffocating him.
The penguin is a waterbird and can survive without air for a long time. If the penguin is imperial, then he is also very large and strong and can give up. It is best not to engage in conflict with penguins at all.
The comments are even better:
I think drowning it is almost unrealistic too :)
Penguins are almost immortal.