Chrysanthemums are short-day plants, requiring a night length of longer than 12 hours to flower. Under which of the following conditions should chrysanthemums flower?
A) night length 14 hours, day length 10 hours
B) night length 10 hours, day length 14 hours
C) night length 14 hours, day length 10 hours; night interrupted in the middle by an intense red flash
D) night length 10 hours, day length 14 hours; day interrupted in the middle by half an hour of darkness
Correct Answer:
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