A:ture
they didn't have the technology like er do or the medicine like we do today
Im going to go ahead an guess drug synergism
Joan Alexandra Molinsky,also known as Joan Rivers, was an American comedian, actress, writer, producer, and television host. She was noted for her often controversial comedic persona, heavily self-deprecating and sharply acerbic, especially towards celebrities and politicians.
Both does not burn the same amount of calories. Running exert more effort than walking. And that makes running to burn more calories that walking. Not unless you walk more more miles away and run only in a short time.
Thus letter D. is not a true statement