Which of the following would you expect from an exothermic reaction? a. no input of energy is needed to start the reaction. b. most heat is absorbed. c. reactants are favored. d. products are favored.

The correct answer is option D, that is, products are favored.  

A chemical reaction in which heat or light is released is known as an exothermic reaction. It is the reverse of an endothermic reaction. In terms of the chemical equation, it is expressed as reactants = products + energy. An exothermic reaction provides net energy to its surroundings, that is, the energy required to start the reaction is less in comparison to the energy discharged.