Answer:
WACC = 0.18 or 18%
Option b is the correct answer.
Explanation:
The WACC or weighted average cost of capital is the cost of a firm's capital structure that can contain one or more of the following components, namely debt, preferred stock and common equity. The formula to calculate the WACC is as follows,
WACC = wD * rD * (1-tax rate) + wP * rP + wE * rE
Where,
WACC = 0.2 * 0.16 + 0.8 * 0.185
WACC = 0.18 or 18%