The correct option is D all of the above
Pneumonia is a highly contagious lung infection characterised by inflammation of air sacs which gets filled with fluid or pus resulting in fever, chills, cough and breathing difficulty.
A healthy person acquires the pneumonia infection by inhaling the droplets/aerosols released by an infected person. The droplets spread during sneezing, speaking, and coughing by an infected person can spread infections. The infections can also spread by touching the nose and mouth with the hands contaminated with infectious droplets. The droplets are so minute that they travel only a short distance before falling. The people nearby might contract infections. Even by sharing glasses, utensils or any other object with an infected person can transmit the disease.