Sentence Correction

Many financial experts believe that policy makers at the Federal Reserve, now viewing the economy as balanced between moderate growth and low inflation, are almost certain to leave interest rates unchanged for the foreseeable future.

A. Reserve, now viewing the economy as balanced between moderate growth and low inflation, are
B. Reserve, now viewing the economy to be balanced between that of moderate growth and low inflation and are
C. Reserve who, now viewing the economy as balanced between moderate growth and low inflation, are
D. Reserve, who now view the economy to be balanced between that of moderate growth and low inflation, will be
E. Reserve, which now views the economy to be balanced between moderate growth and low inflation, is

OA: A

can someone explain A, C and D?

thank u so much!

IMO:

There is 3:2 split between 'to be' and 'as'.
'View X to be Y' is unidiomatic. The correct form is 'view X as Y'. This helps you in eliminating B, D and E.

Choice A and C uses the correct form of the idiom. Problem with C is the word WHO before the comma. The sentence with choice C reads ->

Many financial experts believe that policy makers at the Federal Reserve who ... are almost certain to leave interest rates unchanged for the foreseeable future.

You can't say, 'My dad WHO is a government officer.' This sentence is fragmented.
You say, 'My dad is a government officer'.

Notice the problem with C. The word WHO leaves the sentence open for questions. Policy experts who blah blah blah...? Who what? This helps you in eliminating C.

Choice D has a major flaw. The use of 'THAT OF'. There is nothing in the sentence that 'THAT OF' is referring to.

Therefore, A.
Thanks.