Consider the following statements and decide whether they are true or false:

Optimal capital structure will simultaneously minimize WACC and maximize firm value

Optimal capital structure is the debt$-$equity mix that will maximize earnings per share

Optimal capital structure will simultaneously minimize the costs of debt, equity, and WACC

There's no such thing as an "optimal" capital structure

Select one:

a$.$ One of them is true

b$.$ Two of them are true

c$.$ Three of them are true

d$.$ All of them are true

e$.$ All of them are false