43. Installing scrubbers in smokestacks and switching tocleaner-burning fuel are the two methods available toNorthern Power for reducing harmful emissions fromits plants. Scrubbers will reduce harmful emissionsmore than cleaner-burning fuels will. Therefore, byinstalling scrubbers, Northern Power will be doing themost that can be done to reduce harmful emissionsfrom its plants.[c1]

Which of the following is an assumption on which theargument depends?

(A)[c2] Switching to cleaner-burning fuel will not bemore expensive than installing scrubbers.

(B[c3]) Northern Power can choose from among variouskinds of scrubbers, some of which are moreeffective than others.

(C) Northern Power is not necessarily[c4] committed toreducing harmful emissions from its plants.

(D)[c5] Harmful emissions from Northern Power’splants cannot be reduced more by using bothmethods together than by the installation ofscrubbers alone.D

(E)[c6] Aside from harmful emissions from thesmokestacks of its plants, the activities of

Northern Power do not cause significant airpollution.
求问：C选项OG上的解释是“Even if the company is full committed to reducing harmful emissions, it could be that installing scrubbers is the most it can do to reduce harmful emissions "
这个解释怎么理解呀？特别是"full committed to "