Which of the following is a true statement?
a. a political party is more likely than an interest group to support an extreme policy position.
b. an interest group is more likely than a political party to support an extreme policy position.
c. a political party is more likely than an interest group to support a change in public policy.
d. an interest group is more likely than a political party to support a change in public policy.

d. An interest group is more likely than a political party to support a change in public policy.

Explanation:

                  Here the correct answer is an interest group that is more likely to support a change in public policy because the group of people who wishes a change in the policy is more likely to support for the change than any other organisation.

                  That particular interest group may not like the public policy framed by the government and wants some amendments in the policy, So it is more likely that the interest group will support for the change in the policy than the government.

Thus the correct answer is

d. An interest group is more likely than a political party to support a change in public policy.