Which One of the Following Statements Made by Another EMT

Which one of the following statements made by another EMT, regarding chest pain and acute coronary syndrome, should you agree with?

A) "If the chest pain started during activity, it is most likely cardiac. If the pain started while the patient was at rest, it is most likely not cardiac."
B) "If the patient's chest pain does not go away with nitroglycerin, the EMT should assume that the medication is expired and ineffective."
C) "If the patient experiences chest pain that radiates into the left arm, it is most likely a heart attack. If the pain radiates anywhere else, it is most likely not cardiac in origin."
D) "Many patients experiencing acute coronary syndrome do not have actual chest pain; rather, they experience a sensation of discomfort or pressure."