Discussion
Which drawback does a very high colour temperature bulb have?
Answer: A
Blue tinted bulbs filter out useful light, so they look brighter but illuminate less. Blue light is scattered more in fog and glares more, so the other two options invert the physics precisely. Naming what changes and what stays the same is the reliable route through questions of this shape. Most errors here come from carrying across a result from a neighbouring case where it does not hold.
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