The confusion . . . . . . . . the discovery of the body made everybody lose track of time.

A. had caused

B. was caused by

C. had been caused by

D. caused by

Answer: Option D

Solution(By Examveda Team)

'caused by' means make (something, especially something bad) happen. As the sentence is in simple past tense 'had' or 'had been' is not used.