Cost-Plus Contracts Received by Halliburton Since 2001 Are

Cost-plus contracts received by Halliburton since 2001 are

A) contracts designed to limit the cost of goods and services provided by company to reasonable amounts.
B) essentially blank checks for ensuring the company is reimbursed for whatever it bills for its services plus 2%-7% profit.
C) illegal but tolerated anyway.
D) reasonable and customary charges for doing business in difficult environments.