True or false: if your resting heart rate has decreased since the start of the semester, this means that your heart has gotten stronger and does not have to work as hard during rest.

Which statement best describes common communicable diseases? a. most communicable diseases are either bacterial or viral and infect the respiratory tract. b. all communicable diseases are viruses that cause pneumonia. c. most communicable disease are bacteria and viruses that infect the intestinal tract. d. all communicable diseases are bacteria that grow in the respiratory tract. select the best answer from the choices provided. a b c d