The fiscally responsible individuals are able to use investments to achieve his financial goals by adopting the posture C) Individuals delay the satisfaction of purchases now for possible greater returns later. The decrease in purchases that are made by mere satisfaction will start to remain money to be invested or applied in something, it means the future financial return is certain.
The others answers can't be related:
A) The economy dependent on a number of internal and external factors of the country, all investment today is a risk.
B) It would only make sense for this question if it were like this: Most investments have a guarantee of high returns in a long period of time.
D) Considering that this question is generic, when comparing greater returns with delaying the satisfaction, in practice, it is incompatible with the profile of fiscally responsible individuals.