An employee has $$10,000$ from her monthly salary that she can spend in one or more options: bank savings, dinner with family, charitable donation and sports activities to maximize her utility $($a measure of happiness$).$ Suppose the utility generated per dollar spent in option i $(=1,2,3,4)$ is estimated by c$1=1,$ c$2=2,$ c$3=2\mathrm{.}5$ and c$4=3.$ What is the best description of ci $($i $=1,2,3,4)$ in this problem if it is formulated as a linear program with other requirements?

Group of answer choices

Objective function

Decision variables

Restriction

Parameters