• Reaction rate increased by an increase of surface area of a
reactant. One way to increase surface area is to
a
increase reactant's temperature
b
crush solid reactant into smaller pieces
C
increase reactant's concentration
d add catalyst

B

Explanation:

Crush solid reactant into smaller pieces.

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >