Explanation:
" To minimise deterioration, cutting wheels must be stored in a room which is dry and not subject to extreme temperatures."
Here it means Rust or lack of efficacy.
"the spinning speed the cutting speed danger to the user disintegration"
Here it means the injury that it may cause to the user.
I hope its right.
C. The events can be separate or connected to the main plot.
Public service journalism is when journalists acts as an advocate f or the public, and also is known as investigating reporting and attempts to uncover information. The correct answer is A & D.
I think it would be a. formal