Regarding Research on Whether Animals Are Sensitive to a Passage

Regarding research on whether animals are sensitive to a passage of time, which of the following statements is FALSE?

A) Pigeons put in a Skinner box with a pecking key on each wall were not able to learn to peck at different keys based on the time of day.
B) Rats on fixed interval schedules stop responding immediately after they received a reinforcer and did not start again until just before the next scheduled reinforcement.
C) When scrub jays were allowed to hoard nuts in one location and worms in another, they would go directly to the worms if they were released four hours later.
D) When scrub jays were allowed to hoard nuts in one location and worms in another, they would go directly to the nuts if they were released five days later.