A new interactive television company offering subscribers the ability

I'd caution that you shouldn't be approaching weakening questions this way. Premises in CR questions are facts, so they cannot be wrong or 'weakened'. The question tells us buildings are easy to rewire, and that has to be true no matter what any answer choice says. The question also tells us most residences (but not all, and the ones that are far away may be important) are close to the company's servers. That also must be true.

This isn't a good question for a few reasons (for one thing, we don't even know what we're trying to do -- what does it mean for the "new service to succeed"?). But if we're looking for an answer that suggests the service won't attract many subscribers, we want an answer that gives us a reason, even though the service is easy to install and many potential customers live nearby, to think that people still won't buy it. The stem already gives us a reason -- it's expensive -- so I'm not sure why we need another. But there are three answers you could justify here (which is another reason the question isn't good) -- answer B suggests people won't be interested in the movies on offer, answer C suggests the people who can afford the service aren't in the region served, and answer E suggests there will be new competition that might make it hard for the service to attract business. Answer C seems like the strongest weakener, but we have to make assumptions to choose among the possible answers, which never happens on the real GMAT (and I also have no idea why we care that customers are "in close proximity to the company's servers" -- they're offering movies over the internet, not by bicycle courier).