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The three main categories of construction project delivery methods are accurately identified as design-bid-build, design-build, and construction management at risk.

Design-bid-build is the traditional method in which the design and construction phases are separate. The architect or designer completes the project’s design before contractors bid on the construction work. This method allows for a clear delineation of responsibilities but can lead to longer project timelines.

Design-build integrates the design and construction process into a single contract. In this method, one entity is responsible for both the design and construction, which can enhance collaboration and reduce the delivery time by allowing for overlap in the scheduling of design and construction activities.

Construction management at risk involves a construction manager who commits to delivering the project within a specified budget. This manager works closely with the owner and design team, providing input during the design phase and taking on the risk of any cost overruns during construction.

These three methods are foundational in the field of construction project management and are critical for understanding how projects can be organized and executed effectively. Other options presented may mix different types of methodologies or terms, but they do not encompass the widely recognized categories of project delivery methods in the same structured manner as the correct answer.