Which of the following is known as a reference point or point of reference? * A. Displacement B. Position C. Distance D. Origin will give brainlest

D. The origin is know as the reference point. Everything you do to a function whether that’s reflecting, displacing, etc. happens starting from an origin.

Some connecting rods have to lubricate the cylinder wall or piston pin. the answer is letter d. graphite coating can be a major  additive to many  coating  systems and things such as connecting rods.  it functions as a refractory, lubricant, thermal conductor, and electrical conductor for a machine or thing to enhance its work.