If a ball is rolling across the ground and the Net Force is acting on it in the opposite direction, what will happen to the ball?A-slow down B-Speed up C-nothing​

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.