In the following questions choose the alternative which best expresses the meaning of the given word.
Colossus refers to a person or thing of enormous size, importance, or ability.
While tall, towering and lofty can be used in the context of the height of an object, huge can be used to mean both the scale and the size of an object, idea or capability.
Hence, option B is closest to the meaning of the word "colossus".