GMAT Sentence Correction (SC) | Re: Recently implemented

Recently implemented "shift-work equations" based on studies of the human sleep cycle have reduced sickness, sleeping on the job, fatigue among shift workers, and have raised production efficiency in various industries.

(A) fatigue among shift workers, and have raised

The answer is C

But iam just helping myself to check wether my thinking is correct to negate the A.

If the and was appropriate this would have meant :-

The SWE have reduced sickness,reduced sleeping,reduced fatigue