In today's time, Republicans would most likely support a tax decrease for businesses.
The reason why it's not A is because Republicans believe jobs can be created through business (business owners create new openings which means new jobs)
It's not B because the Republicans favor businesses. Regulating the business industry would mean creating less jobs and profit for them.
As for C, the Republicans want a stricter enforcement of housing in our current situation (improve on what we have), not to create a new and improved public housing project.