求助GWD-7-1

小老海盗

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.

 

1. factors and not necessarily foreshadowing that there would be
2. factors and not necessarily that it foreshadowed
3. factors and did not necessarily foreshadow
4. factors, while not necessarily a foreshadowing of
5. factors, while it did not necessarily foreshadow that there would be

小老海盗

答案是C  

 A和B怎么了?