The government is shielded from suit by the doctrine of sovereign immunity. The doctrine comes from an ancient principle of English public law: ‘The King can do no wrong.'
The rule is not intended to protect public officials from charges of wrongdoing.
As a result of the principle explained in this excerpt from the text, citizens of the United States:

A) cannot sue representatives or officers of the Federal Government even if they commit a crime.
B) must petition their representatives in Congress to pass an act to let them sue the government.
C) need to bring their case to the Supreme Court and win a ruling authorizing them to sue the government.
D) can only sue the government in limited cases already approved by Congress.