John Atkinson is a Psychologist, who in the 1950's created an equation with a number of factors that influence a person on his road to achieving success. The equation is as follows:
Ts=Ms x Ps x Is
In this equation, T is the representation of a person's tendency towards success, M is the motivation (option A) P is the probability of success (option B) and I is the incentive value of success (option C)
The only factor that is left out is option D: the length of time needed for a goal, and it makes perfect sense that is left out, your determination will not be deterred by the time it tokk you to acieve your goals. The harder the battle, the sweeter the victory.