Which One of the Following Statements Is True Regarding the U.S

Which one of the following statements is true regarding the U.S. Supreme Court's decision on the Affordable Care Act in 2012?

A) The Supreme Court declared the act unconstitutional, thereby preventing the states from expanding their Medicaid programs.
B) The Supreme Court declared the act constitutional and thus required the states to expand their Medicaid programs.
C) The Supreme Court declared the act unconstitutional, thereby freeing the states to expand their Medicaid programs.
D) The Supreme Court declared the act constitutional, but also allowed the states to be free from participating in expansion of their Medicaid programs.