After a teenager in the neighborhood was diagnosed with HIV, Mark would not allow his teenage children to use the public toilets in that area fearing they could,
too. Which of the following statements is true in this scenario?

a) HIV could pass from an infected person to a healthy person through toilet seat covers.
b) HIV can be transmitted through the human feces of an infected person, and the father is wise to protect his children.
c) Although the virus cannot be transmitted through shared toilet seats, Mark is wise to be concerned since it can be transmitted through sink usage
d) HIV is not transmitted through the usage of same toilet seats. Routes of HIV transmission are well-documented. There is no danger.