Which of the following statement(s) about the structure of the sun is/are true? a)Atoms absorb and reradiate electromagnetic energy generated in the core moving it to the sun's surface b) The convection zone consists of low density gases, stirred by convection c) As the gases warm and become less dense, they rise to the sun's surface d) The gases emit energy into space in the form of visible light, ultraviolet light, and infrared radiation