How can a chemical reaction be sped up? Select from the drop-down menu to correctly complete the statement.
Pack in more of the reactant to increase the
A) Catalyst
B) Concentration
C) Surface Area
D) Temperature

the law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. because atoms are only rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.

i'm assuming that the correct answer is indeed the first one/ "a"..

the dependant variable is spilled water

the independent is the heat