Christmas Cactus Is a Short- Day Plant That Usually Blooms

Multiple Choice

Christmas cactus is a short- day plant that usually blooms in the winter.Which of the following strategies might induce it to bloom for the 4th of July?

A) putting it in a cool,well- lighted place from time to time during June
B) leaving it in a dark closet all night and part of each morning during June
C) exposing it to light several times during each night in June
D) putting it in a dark closet for a short time every afternoon during June