Which of the following is an example of an OTC oral agent?

Which of the following statements about good manners is most correct?

A) Rules of good manners vary in different societies. B) Rules of good manners are fairly universal globally. C) Rules of good manners do not change over time. D) Rules of good manners are based on human instinct.

Which one of the following statements about the circulation of blood is TRUE?

A) Pulmonary arteries are the only arteries that carry oxygenated blood. B) The right myocardium is thicker than the left myocardium. C) The right atrium receives oxygenated blood from the vena cava. D) The left atrium sends oxygenated blood into the left ventricle.