CEdward
I can't say I like this question. Once I saw A, I immediately knew where it was going, but the problem is A) requires us to make another assumption - that there are only two mutually exclusive possibilities: the company's having a concern for the environment or the company's concern about their profits/sales.
Suppose we negate A), then the choice would say
Oil company CAN have more than one motive for cleaning the otters affected by the oil spill
Why should we necessarily assume that this other motive is concern for the environment?
On the other hand, if we negate C :
Oil company HAS NOT always shown a high regard for its profits in choosing its courses of action
Then this weakens the argument because it suggests that there have been times (like this one) where the company CAN be concerned about something else...e.g. environmental concerns
CEdward, I am personally not a fan of the negation technique as I don't enjoy it and have difficulty in negating things in the right manner. The negation of words such as can/cannot, some/none, few/more, etc often leaves me confused so I avoid it. That said, I'm happy to share my POV on this question.
The environmentalist has basically established one concern of the oil company behind the cleaning drive - the images would be damaging to the company's public image. We won't be refuting/going against this concern as we're looking to support the environmentalist. We're trying to say that the company only cares about their profits,sales,etc (basically the business side of things) and not the oaters,environment, etcs.
Option C - oil company has always shown a high regard for its profits in choosing its courses of action.
This option is basically saying that the company REALLY, REALLY cares about their profits. But Of course, that does not mean that they don't care about the environment. We have no idea what else it cares about. High regard does not mean the highest regard. We have no idea if the company cares about the environment or not. I agree that this option is definitely not bad and is a close second.
Option A - oil company cannot have more than one motive for cleaning the otters affected by the oil spill
Basically says that there is just 1 motive behind the cleaning drive. We already know that that 1 motive is the company's image. The company itself made the press-release and of course, we're looking to support the environmentalists.
Hence, A is better than C IMO. Would like to know what you think and hope this helps!