Although producer prices rose at an unexpectedly steep rate in September, analysts said that the increase resulted mostly from temporary factors and not necessarily foreshadowing that there would be a resurgence of inflation.
A. factors and not necessarily foreshadowing that there would be
B. factors and not necessarily that it foreshadowed
C. factors and did not necessarily foreshadow
D. factors, while not necessarily a foreshadowing of
E. factors, while it did not necessarily foreshadow that there would be
Can experts please explain what is wrong with D ? Basically i would like to understand the usage of while in this sentence and what makes it wrong. I selected D in the exam but it is the wrong answer. The OA is C
A and B are wrong because we usage of and not is wrong.
Many thanks in advance.