Which of the following could be a linear programming objective function?

$Z=1A+2BC+3D$

$Z=1A+2B+3C+4D$

$Z=1A+2\frac{B}{C}+3D$

$Z=1A+2B^2+3D$

Question $8$

The campaign manager for a doomed candidate is considering the which states to vis the last frenzied campaign week leading up to the nationwide election. Pennsylvania Wisconsin $($W$),$ Florida $($F$),$ New York $($Y$),$ and North Carolina $($C$)$ are all aching for one but the candidate has only $80$ hours and $$250$ million left in her campaign fund. A visi Pennsylvania takes $10$ hours and costs $$15$ million but earns $1\%$ of the electorate. A Wisconsin takes $15$ hours and costs $$20$ million and earns $1\mathrm{.}5\%$; a visit to Florida is or million but takes $16$ hours and earns $2\%,$ and a visit to New York costs $$25$ million, re hours and earns $2\%$ of the electorate. North Carolina requires $18$ hours and $$22$ millic trip but earns $3\%$ of the electorate.

What is the objective function?