Answer: a. contingency contract
Explanation
Contingency contract is a type of contract that comes with conditions and actions that must be met. It is a "if" type of contract that spreads out actions that must be taken to get certain outcomes and results. This type of contract is adopted when it is difficult for parties involved in a contract to reach an agreement. Contingent contracts can exist between a teacher and students which mandates the teacher to achieve certain goals on the students, and the teacher is rewarded based on impact on the student. It could also exist between a therapist and client, etc.
