You would like to evaluate TSLA's stock. You find out the following about TSLA needed to do so:

(1) Their CAPM beta is 1.6. (2) The weighted-average YTM (cost-of-debt) on TSLA's bonds is 4%. (3) Tesla's effective tax-rate is 25%. (4) TSLA's capital structure mix is 96% equity and only 4% debt. TSLA has 932 million shares outstanding. (5) The risk-free rate is currently .5% and the market risk-premium is 6%. (6) Below are TSLA's expected OCFs (operating cash flows) for the next 5 years:

Year 1: $2,400,000,000 Year 2: $3,000,000,000 Year 3: $3,700,000,000 Year 4: $4,600,000,000 Year 5: $5,900,000,000

After year 5, TSLA is expected to grow its OCFs at a very impressive 6% per annum, indefinitely. Tesla is currently trading at $210 a share. What is TSLA's WACC, or firm-wide discount rate, we should use to discount its future expected OCFs?

a. 7.84

b. 9.82

c. 9.92

d. 10.04