Which of the Following States Correctly the Formality and Use

Which of the following states correctly the formality and use of hallway discussions?

A) In terms of formality, hallway discussions would be rated medium. In terms of use, hallway discussions would be used to inform.
B) In terms of formality, hallway discussions would be rated high. In terms of use, hallway discussions would be used to inform.
C) In terms of formality, hallway discussions would be rated low. In terms of use, hallway discussions would be used to inform and resolve issues.
D) In terms of formality, hallway discussions would be rated high. In terms of use, hallway discussions would serve as a permanent record.
E) In terms of formality, hallway discussions would be rated medium to high. In terms of use, hallway discussions would be used to resolve issues.