A.The total grain output in 1995 more than quadrupled the 1949 figure, of an
average increase of 31% a year.
B.The total grain output in 1995 more than quadrupled, comparing the 1949
figure, or an average increase of 31% a year.
C.The total grain output in 1995 more than quadruples 1949, compared with
its output figure, or an average increase of 31% a year.
D.1995 and 1949 were in comparison that the former quadrupled the latter in
terms of the total grain output figure, or an average increase of 31% a
year.