Answer:
D) Talc
Explanation:
David's teacher passed out the mineral talc. This is true because talc is the softest mineral on the Mohs Hardness Scale. It is often white. A good way to remember talc is that talc and baby powder, something talc is commonly found in, are both white. When shown in schools, talc is often scratched with a fingernail to prove how soft it is.
