A) continue in the absence of environmental cues such as light-dark and temperature cycles.
B) operate on at least a circannual rhythm rather than simply a circadian rhythm.
C) operate on a single period within a particular species, such as circalunidian rhythm.
D) require the presence of environmental cues such as light-dark and temperature cycles.

A) circadian
B) circalunidian
C) circamonthly
D) circannual

A) forcing it to run according to an environmental cycle such as seasonal differences, that is different from its usual one, such as daily light-dark cycles.
B) removing all environmental cues and allowing the clock to free-run.
C) resetting it to synchronize with a particular environmental cycle.
D) all of the above.