Recent studies suggest that ride-sharing services could do a much better job providing useful information to drivers. For example, one current app provides heat maps... but only when surge pricing is in effect and demand is strong. But it doesn't help drivers figure out how to optimise their business during the doldrums, when demand is poor.
"poor" most nearly means:
I was having a hard time choosing between (c) and (d). The answer is (d) and I guess it makes sense since weak is the opposite of strong, but wouldn't (c) also make sense as well?