【单选题】

in a contract, the point of total assumption refers to the point where:

a. the customer incurs the total financial responsibility for each additional dollar spent.
b. the contractor incurs the total financial responsiblity for each dollar spent.
c. the schedule and cost variance are zero.
d. the customer will incur no further costs for the work the contractor performs in the completion of the contract.
e. b and d only.