Let me break this one down since no one has provided an explanation yet.
This is a principle justify (strengthen) question. We are looking for an answer choice that will strengthen the reasoning used to arrive at the conclusion, one that will be stated in the form of a principle.
Argument Core
Conclusion: the Homeowners' Journal should run an article giving information to homeowners on how to reduce the risk of renovations
Support:
Doing such renovations can be hazardous because of the poisoning released from the lead.
Even though they should be done only by contractors who are experienced, many people won't have someone do it because they believe they can do it themselves.
Reasoning:
The issue with this problem is that the author does not establish a link between the premise and the conclusion - we are not told that if people are likely to do such renovations themselves despite how dangerous they are, information should be given to them on reducing the risks involved. Our principle will bridge that gap.
Answer Choices:
A. this says nothing about the Journal providing them with information.
B. Is exactly what we want. People refuse to change behavior even after warned is a good match up to our premise about people taking it upon themselves. And the necessary condition about information being provided matches our conclusion. This is our answer.
C. this would go contrary to the argument because we do have such risks here.
D. Like A, this misses the point about informing people about the dangers.
E. close, but what about informing them. This wouldn't allow us to arrive at our conclusion about the Journal informing them.
B is our answer.