<span>The correct answer is
(b). The assassination attempt of President Ronald Regan was the proceeding
event of the Brady campaign to prevent gun violence in 1981. The campaign is
named after James (Jim) Brady who was permanently disabled as the result of the
attempted assassination. The Brady Campaign to Prevent Gun Violence, a
non-profit organization, was led by Brady’s wife, Sarah, from 1989. to 2002.</span>
That statement is true
When presidents are elected with popular mandate, it is very easy for the presidents to pass any laws that he/she wants because their sheer popularity would give overwhelming public support that put pressure for the opposition to conform.
Since Kennedy was elected by a slim margin, a large portion of public still oppose his policies during earlier years of his presidency. This make it easy for his opposition to limit his movement so he can't pass the policy that he wants.
