Answer:
The answer is B. Steve Donohue believes that rain barrels are easy to install and use.
Step-by-step explanation:
An objective statement is one in which the author's opinion or interests are not included, options A, C, and D, all include the authors opinions on rain barrels, therefore they are subjective statements.
In option B, the author explains what somebody else thinks about the topic, but he doesn't give his own opinion, which is why option B is the right answer.