Explanation
According to the PMBOK Guide, 7th edition, one of the key practices for project delivery is to "identify and respond to risks and opportunities" (p. 122). This practice involves identifying, analyzing, prioritizing, and implementing responses to risks and opportunities that may affect the project objectives, scope, schedule, cost, quality, or stakeholder satisfaction. The project manager should share the opportunity with another project that may benefit from it, as this will help to maximize the value creation and optimize the use of resources.
Establishing a contingency reserve, taking no more action, or further monitoring the opportunity are noteffective ways to handle the situation, as they do not address the root cause of the problem, which is the opportunity that is outside of the project scope. References: PMBOK Guide, 7th edition, p. 122; PMP Exam Content Outline, Domain II: Process, Task 4.