This question can be answered with the help of a trusty dictionary! D is the correct answer. A sleuth is a detective, an epiphany is a sudden realization. Used as a noun, a mammoth is a giant extinct species of elephant; used as an adjective, mammoth means large. Juggernaut refers to a powerful force.
Which of these is an overwhelming force? A. Sleuth B. Mammoth C. Epiphany D. Juggernaut