[kirstienisbett]

a) the reactants must have a high enough concentration
b) the prouduc must be of lower energy than the reactants
c) the reactants must be of lower energy than the products
d) the reactants must have sufficiant kinetic energy to overcome thae activation energy barrier

Someone please help me, im so stuck

[catalyst]

If you read the forum rules it says that you would have to have shown that you at least attempted the problem, which you haven't really shown.

I would start by looking up the terms mentioned in the answers given (i.e. kinetic energy, concentration, reactants, products, activation energy). If your book is worth what you paid for it, it will probably point you in a general section of the book.