"[N]ot Only Did Talking to or Being Around the Sick

"[N]ot only did talking to or being around the sick bring infection and a common death, but also touching of the sick or anything touched or used by them seemed to communicate this very disease to the person involved." In this quote from Giovanni Boccaccio, what knowledge of the Black Death is he sharing?

A) Any contact with the sickened individual, or items that the sick had contact with, would result in the infection of those initiating the physical contact.
B) The sick individual's clothing and bedding needed to be cleaned regularly.
C) The only way to avoid infection was to join a group of flagellants and be scourged and whipped, in order to be saved by God.
D) People need absolution from God before they have contact with the infected and the sick.