Looking at Boeing's share price for the previous years, what statement below you believe is true about paying for the risk response of grounding the planes? 

a. Boeing only used the contingency reserve to pay for the risk response 

b. Boeing used the contingency reserve, the management reserve, the profits and the company's (investors') money to respond to the risk 

c. Boeing had sufficient reserves to pay for the risk response 

d. The risk response did not cost Boeing any money