TELEVISION COST

[sogmat]

Soaring television costs accounted for more than half the spending in the presidential campaign of 1992, a greater proportion that it was in any previous election.

a- a greater proportion that it was
b-a greater proportion than
c- a greater proportion that they have been
d- which is greater than was so
e- which is greater than it has been

oa b

What happens to all the comparison learning[/spoiler]

[kanha81]

Soaring television costs accounted for more than half the spending in the presidential campaign of 1992, a greater proportion that it was in any previous election.

a- a greater proportion that it was
b-a greater proportion than
c- a greater proportion that they have been
d- which is greater than was so
e- which is greater than it has been

oa b

What happens to all the comparison learning[/spoiler]

A-- What is "it" referring to?
C-- what is "they" referring to?
D-- Awkward
E-- What is "it" referring to?

Hence [spoiler][/spoiler]

[snsubbu]

I will go with B.

soaring television costs ---- so plural
Eliminate A, D and E

C is awkward and unidiomatic.

[blackarrow]

My answer is B too

besides points mentioned above,
Only B correctly says Greater...than

Greater that (A,C ) are not correct.

Rest are also wrong and awkward