How do sharks survive without food for a long time

A．He has finished the paper.
B．He put his paper somewhere else.
C．He forgot to begin researching his paper.
D．He postponed the research.

A．Because they actually have nine lives.
B．Because they reach speeds of 60 miles an hour and more.
C．Because they have time to stretch their body to diminish the shock.
D．Because they have learned their skills from flying squirrels.