Which is true regarding ex post facto laws?

a. only the states may pass ex post facto laws.

b. only congress may pass ex post facto laws.

c. ex post facto laws happen often in the united states.

d. ex post facto laws are rare in the united states.

The correct answer is letter d, where in ex post facto laws are often in United States even though it has already been considered illegal. Another reason why letter a and b is incorrect was because of the reason that the state and congress does not have the capability of passing the ex post facto laws.

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