5. justice rehnquist said the decision left the abortion area of the law more confused than it found it

He meant by the statement that the decision of the court would change how the law regarding abortion in the first trimester is exercised and make its use more confusing.

Explanation:

After the court brought the law of abortion under the premise of the fundamental constitutional right to privacy or liberty, Justice Rehnquist questioned the broadness and the significance of the law and asked whether it is really that important to restrict the state from indulging into the matters of abortion in the first trimester of the pregnancy. He believed that the decision given by the court in the matter would make the use of the law more troublesome.

Answer// dinosaurs emerged during mesozoic era;

The correct answer is:   [b]:   "physical systems" .