Which statement best describes President Obama's approach to health care reform?

a$.$ His task force crafted the president's version of health care reform while the Republicans prepared their own, with the expectation of a final compromise between the two.

b$.$ He sought to build universal coverage on the existing system of employer$-$sponsored insurance.

c$.$ He set broad parameters and then left it to the Democratic leadership in Congress, working with committee chairs and members, to fill in the details and craft the actual legislation.

d$.$ He made no effort to engage stakeholder interests or skeptics in Congress.