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Critical Chain focuses on resource constraints and variability by protecting the delivery date with time buffers rather than padding each activity. The project buffer is placed at the end of the critical chain—i.e., after the last task in the longest sequence considering resource dependencies. Its purpose is to absorb aggregate variance so that delays in upstream activities do not slip the committed finish date. Feeding buffers (Option A) are inserted where noncritical chains feed into the critical chain; they protect the critical chain from upstream slippage on those paths. Resource buffers (Option C) are alerts or flags positioned ahead of tasks that require critical resources to ensure availability and timely start, not extra time added to duration. Management reserve (Option D) is governance-held contingency outside baselines, not a scheduling mechanism inside the network model. CAPM candidates should recognize that CCPM reduces multitasking, uses aggressive but achievable task durations, and tracks buffer consumption as a leading indicator. When buffer burn is faster than planned, managers take action—resequence, remove impediments, or add focused support—before the final date is threatened.