garbinder
My doubt is that we have assumed the analysts to agree on the two topics, but what if they are linked, (option C that the index was unlikely to go up, with inflation to remain...). How is option C incorrect and what would the correct answer look like in that case.
Check out this post if you haven't already:
https://gmatclub.com/forum/although-the ... l#p2619992.
The bottom line is that there are two subjects here: the (1) index and (2) inflation, so it's hard to "link" them in a way that still makes the meaning clear. Also, if they are linked, then doesn't that mean that the analysts agree on both of them? If so, (A) is the clearest way to express that idea.
And if the inflation part is totally separate and not something that the analysts agree about, then we'd want to separate that part entirely -- maybe something like, "Inflation remained under control, and most experts agreed that...".
I hope that helps!