What changed rate of reaction?

Question

. Which of the following changes is likely to ​DECREASE​​ the rate of a reaction?

A. increasing the activation energy

B. increasing the concentration of reactants C. increasing the temperature

D. reducing the activation energy

Answer 1

It would really help to know exactly what reaction you are referring to.

An increase in activation energy would decrease the rate.

Changing the concentration of reactants will not decrease the rate

Increasing the temperature will decrease the rate if and only if the reaction is exothermic

Reducing the activation energy will not decrease the rate.