A 60-year old man is diagnosed to be suffering from Legionnaires' disease after the returns home from attending a convention. He could have acquired it -
A
From a person suffering from the infection while travelling in the aeroplane
B
From a chronic carrier in the convention center
C
From inhalation of the aerosol in the air conditioned room at convention center
D
By sharing an infected towel with a fellow delegate at the convention