Choose the correct order of the jumbled parts to form a coherent sentence:
1: In spite of an unprecedented boom in the market
P: and had to remain content
Q: the paper-dealer could not
R: push up his sales
S: with a volume of sale lower than
6: what he had sold the previous year.
(a) RQSP
(b) QPRS
(c) PQRS
(d) SQRP