Given below are four jumbled sentences. Select the option that gives their correct order.
A. Expert mechanics labored over the plane for three hours.
B. A small nut had fallen into a channel which prevented the gear from moving.
C. A huge plane was forced to crash land when its landing gear got stuck.
D. They were amazed when they discovered what had caused the mechanical failure.

A

BADC

B

CADB

C

ACBD

D

DBAC