John Calvin taught that
a.
God decides who goes to heaven.
b.
doing good gets people to heaven.
c.
people should obey the pope.
d.
only clergy can know the truth.

a. God decides who goes to heaven.

Explanation:

In 1536, he published the landmark text Institutes of the Christian Religion, an early attempt to standardize the theories of Protestantism. Calvin's religious teachings emphasized the sovereignty of the scriptures and divine predestination—a doctrine holding that God chooses those who will enter Heaven based His omnipotence and grace.

"choosing is refusing" means individuals face an opportunity cost with each decision they make. economists state that every decision involves trade-offs. opportunity cost is the least desirable alternative given up as a result of a decision.