Given below are four sentences, three of which, are jumbled. Pick the option that gives the comet order.
A. You do buy old books, don't you?
B. People seem to prefer to buy new books nowadays.
C. Business is not so good as it used to be.
D. I'll have to see what you have got before I answer your question.

A

ACBD

B

ABCD

C

ADCB

D

ACDB