Which statement about president kennedy is true?

a.
he ordered federal officials to arrest martin luther king, jr., for staging sit-ins at segregated lunch counters.

b.
he only appointed people to his cabinet who shared his political views and agreed with all his policies.

c.
he followed president eisenhower's advice to keep a low profile and not be controversial.

d.
he visited the divided city of berlin and gave a powerful speech about political freedom.