Answer:
The correct answer is D.
Explanation:
A is very informal due to the use of slang such as ''ain't''.
B has an informal tone and language due to the usage of 'you guys' to address other people.
C is very informal due to the use of shortened street slang ''Y'all'' commonly used in informal set-ups for example among friends.
I think is C because in the text it's the main idea.
This new adhesive were someday used for store-bought tapes, it could help the environment in more than one way. Lignin is a waste from making paper and ethanol from trees. So this glue wouldn't just replace adhesives made from crude oil. It also would
