Which best describes the limits of science?
a. science cannot answer questions about the physical world.
b. science can answer only mathematical questions.
c. science can answer any question.
d. science cannot answer questions about what people should do.

The correct answer is d. Science cannot answer questions about what people should do.
Science is the set of explanations and predictions (that are testable) about the universe. It includes branches such as natural sciences (biology, chemistry, physics), the social sciences (psychology, sociology, economics), and the formal sciences (mathematics, logic, computer science). Even though it is acceptable and contains all the proven knowledge it cannot tell people what to do and how to act.