What Was the Primary Benefit of Centralizing the Federal Government's

What was the primary benefit of centralizing the federal government's power to create criminal laws?

A) The federal government saved a considerable amount of money by taking charge of criminal statutes.
B) The centralization reduced variation in criminal statues between provinces.
C) Centralization ensured safety for settlers heading west.
D) Federal control of criminal statutes led to an increase in the use of capital punishment, and this in turn led to fewer serious crimes being committed.