If a firm can shift its capital structure so as to change its WACC, which would be preferred?

a$)$ Decrease the WACC which will increase the value of the firm

b$)$ Increase the WACC because this will increase the value of the firm

c$)$ Decrease the WACC because this will decrease the value of the firm

d$)$ Increase the WACC because this will decrease the value of the firm

e$)$ None of the above