Answer:
B, they share similar chemical properties.
Explanation:
OK so I'll give you two examples you can catch it if someone who is infected coughs or sneezes so basically it can be spread via airborne or you can even get it from sharing food or drinks also the best way to get rid of strep will be antibiotics/over the counter medicines or gargling warm salt water
I think is D 2 dimensional coordinate point I’m not sure though