D neither a nor b is right
Generally, dogs have many similarities with the human race, as we both are vulnerable to same diseases, etc. but we don’t necessarily need everything a dog needs. Although it seems we are very alike in a way, we are actually different in some. Such as: dogs have very sharp instincts, like smell, navigation, detecting illness among humans, and able to see their own farts. Idk a lot, and i suggest you look it up on a credible site. :)
Pathogens usually enter our bodies through the eyes, mouth, nose, or urogenital openings, or through wounds or bites that breach the skin barrier. Organisms can spread, or be transmitted, by several routes.
So i would say no, that is false?