Which behavior is a sign that someone is having a heart attack

How could you find out if that advice is based in scientific evidence?

Which of the following accounts for someone who has had regular herpesvirus-mediated cold sore or genital sore flare-ups? a) re-infection by a closely related herpesvirus of a different strainb) re-infection by the same herpesvirus strainc) copies of the herpesvirus genome permanently maintained in host nucleid) copies of the herpesvirus genome permanently maintained in host cell cytoplasm

Which influences are classified as part of your social environment? a) traits b) friends c) habits d) foods? me !