According to the PMBOK® Guide and the Standard for Project Management, the strategy described is Exploit. This is a specific response strategy for Opportunities (positive risks/upside risks) where the organization wants to ensure that the opportunity is realized.
As per PMI standards, the Exploit strategy is used for high-priority opportunities where the organization wants to eliminate the uncertainty associated with a particular upside risk by making the opportunity definitely happen. This is the most aggressive of the positive risk response strategies. Examples include:
Assigning the most talented resources: Ensuring that the best staff are working on a project to reduce the time to completion or improve quality beyond the original scope.
Using new technologies: Implementing a technological advancement to reduce cost or duration.
Providing more than requested: Delivering a higher level of service or functionality that results in a strategic advantage.
The other options are incorrect based on the following PMI definitions for opportunity responses:
Enhance: This involves taking action to increase the probability or the positive impact of an opportunity. Unlike exploit, it does not guarantee the outcome; it simply makes it more likely.
Share: This involves allocating some or all of the ownership of the opportunity to a third party who is best able to capture the benefit for the project (e.g., a joint venture).
Accept: This involves being willing to take advantage of the opportunity if it arises, but not actively pursuing it. This can be passive (no action) or active (establishing a contingency reserve).
As per the PMI Lexicon of Project Management Terms, the Exploit strategy is a proactive approach to risk management that focuses on maximizing the value and benefits that can be derived from uncertain events.