Since the construct is adverbial, I will go with {B}

aditya8062 wrote:

Since the construct is adverbial, I will go with {B}

well both A and B are adverbial
also the merger can be done with some intention
the OA is B but honestly i am not able to justify the usage of "would" in B, as mentioned above

aditya8062 wrote:The two oil companies agreed to merge their refining and marketing operations in the Midwest and the West, forming a new company for controlling nearly fifteen percent of the nation's gasoline sales.
A. forming a new company for controlling
B. forming a new company that would control
C. which would form a new company that controlled
D. which formed a new company for controlling
E. which formed a new company that would control

my doubt: i am somehow not able to justify the usage of "would" in option B ."would" is used in two circumstances
1)to describe some hypothetical situation such as --> if i had one million, I would .....
2)to describe an even that was still a future event at the time described in the sentence but is no longer a future event
for instance ----> last year,people predicted that germany would win the world cup.

the "would" of B gives me a notion that all this controlling has been achieved and that someone is speaking this sentence after 20 years of that merger!!
also "for controlling" seems much better because at least it is giving a purpose of that merger
how do i reconcile this ?
thanks and regards