1. Completing a performance obligation over time can be satisfied in a number of ways. Which of the following is a criterion for demonstrating that a performance obligation has been satisfied over time?

a)The benefits provided by the seller are used by the purchaser when they are provided.

b)The purchaser obtains control of the asset or improvement only when the seller has completed the creation or improvement of the asset.

c)The purchaser has an enforceable right to payment for work done to date, and the asset created by the work done cannot be used by the seller for another purpose.

d)The seller has incurred expenses in creating an asset for the purchaser that must be matched to revenue from the purchaser.