Given below are four jumbled sentences. Pick the option that gives their correct order.

A.    Clearly focused, he intently casts his eyes downward.

B.    He leans forward, with his elbow on his knee and hand supporting his chin.

C.    This bronze sculpture is known as The Thinker.

D.    A man sits alone on a rock, absorbed in thought.

a) BACD
b) ACBD
c) DBAC
d) CADB