This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to care for a christmas cactus
Give your christmas cactus bright but indirect light.
Keep the plant in a well-lit location (like near a window) away from direct sunlight-too much heat and light can stunt growth and burn the leaves. It should also be away from drafts, heat vents, fireplaces or other sources of hot air.

OPT:
(A). Move an indoors plant outdoors in summer to a shady location. It is best to keep in a normal house temperature range, about 65 to 75 f (18 to 20 c).
(B). If you have a car, keep a space heater handy in your car at all times. Only use this in the winter, or you risk overheating the outside of your car.
(C). Cool your cactus down in the early morning before lights start to flash in the area. As it ages, the plant develops seeds and begins to flower.
(D). Leave the stem of the christmas cactus about two feet (60 cm) from any major window openings or air ducts. Give the plant one or more indirect rays every four to six days.
The answer is:
(A).