Select Which of the Following Is an Example of an Ex

Select which of the following is an example of an ex post facto law.

A) Anyone who has ever owned a vehicle that polluted the environment, beginning in 1950 until the current year, will be subject to a $200 fine for each year of vehicle ownership payable to the Environmental Protection Agency. This law shall take effect in three months from the time of passing through both legislative bodies.
B) Anyone owning a vehicle that pollutes the environment will be subject to three months in prison. This law shall take effect in three months from the time of passing through both legislative bodies.
C) Anyone who murders another person with malice aforethought will be punished by a fine of $4,000 payable to the nearest family member of the victim. This law shall take effect in three months from the time of passing through both legislative bodies.
D) Anyone who murders another person with malice aforethought will be punished by four years of imprisonment. This law shall take effect in three months from the time of passing through both legislative bodies.
E) Anyone who commits three felony violations will be sentenced to lifetime imprisonment, so long as the third felony violation occurred after the time of this bill's passing.