Translations for latin

Which best summarizes what scientists learned about how microbes benefit the human body? they are part of a normal human ecosystem. they have become less harmful to humans than they used to be. they process nutrients, fight disease, and accommodate change. they humans overcome the effects of antibiotics.`

Missus a. having been sent b. going to send c. having sent d. sending

Does any one here play destiny 2? so that this question doesnt get deleted oo, what is pi r ^2 of the circumference 0of 5