How Do Nastic Movements Differ from Tropisms

Multiple Choice

How do nastic movements differ from tropisms?

A) Nastic movements are slower than tropisms.
B) Nastic movements only occur in the dark.
C) Tropisms are directional responses to directional stimuli; nastic movements are the same regardless of the direction of the stimulus.
D) Nastic movements happen after a stimulus,tropisms happen during a stimulus.
E) Nastic movements are not reversible.