Sorry for Bumping this thread after 1 year.
Ron Sir,
Please see If my Postmortem for the INCORRECT options is correct or I have faltered at some places -
B. Because of plunging prices for computer chips, which is due to an oversupply
Modifier that starts with "which" here changes the meaning as if computer chips are due to an over supply.
Also,
I believe both the preceding subjects are in plural: plunging prices or computer chips - Therefore the singular "is" in the modifier doesn't make sense here.
You have done a fantastic discussion over one other problem on the usage of "because of".
CitationY because of X that means in the chronology of event the X must have occurred before the Y.
This is a modifier - which is due to an oversupply [,________,] = Non essential because it is in 2 commas.
X = Because of plunging prices for computer chips
Y = the manufacturer has announced that it will cut production by closing its factories for two days a month.
Uses of because of seems to be perfect here.
C. Because computer chip prices have been sent plunging, which resulted from an oversupply
Which seems to modify plunging here, but the intended subject to be modified was plunging chip prices.
D. Due to plunging computer chip prices from an oversupply
There are 2 ways to tackle: "due to" Either replace it by "caused by" and see if it does works. Because due to and caused by are interchangeable.
or
Replace "DUE TO" by "because of" - If it works with because of that means "due to" is wrong. "BECAUSE OF" and "DUE TO" are not interchangeable.
Here "BECAUSE OF" works, thus, "DUE TO" is wrong.
E. Due to an oversupply, with the result that computer chip prices have been sent plunging
Not only is this sentence slightly wired, but redundant too. Due to and the modifier with_______ causes redundancy.
P.S. although I treat weirdness as a negative sign, Normally I do not make weirdness as a decision point.