In the 1980s advertising revenues accounted for approximately 40% of operating profits of a typical local newspaper; in the 1990s this proportion increased to 57%.
A)newspaper; in the 1990s this proportion increased to 57%.
B)newspaper; in the 1990s they increased by 57%.
C)newspaper, in the 1990s they increased to 57%.
D)newspaper; increasing to 57% in the 1990s.
E)newspaper, which increased to 57% in the 1990s.
OA A
In OA what THISrefer to?
Also please explain each options.
newspaper
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