Which statement supporting restrictions on guns aligns with the supreme court's decision in a 1939 case? a. citizens should be required to have extensive training before they can own guns. b. gun control is needed to protect public safety, regardless of what the second amendment says. c. americans should not be able to keep guns in their homes. d. people should not be allowed to carry certain types of guns across state lines.

The right answer is "D.People should not be allowed to carry certain types of guns across state lines."

In 1939 it was decided that the Second Amendment fixed, according to the new understanding, the individual right to the possession of arms of any and all American citizens. Two years later, the Court decided that the Second Amendment was binding on States. Yet legislation on weapons varies greatly from state to state and results in heated political and legal disputes.

The answer is: People should not be allowed to carry certain types of guns across state lines

According to the court at that time, assault weapon that commonly used for warfare should not be allowed to be carried across state line. They see it as dangerous and a threat to the safety of citizens in other state and they can't always sure that that gun owners had good intention when carrying it.