Which of the following is the ceiling of Class C airspace at Metropolitan Oakland International?

The ceiling of Class C airspace at Metropolitan Oakland International is determined by specific regulatory guidelines. Class C airspace generally extends from the surface up to a specified altitude above the ground level or mean sea level. In the case of Metropolitan Oakland International, the ceiling of Class C airspace is typically defined as extending from the surface up to 3,000 feet MSL, which indicates that operations are allowed within that vertical limit for aircraft.

Additionally, it is relevant to note that the lower limit can be specified as a certain height above ground level (AGL) in certain contexts, which in this instance is also stated as 2,100 feet AGL. This reflects the airspace structure whereby the Class C extends vertically from the surface to 3,000 feet MSL, while also incorporating a lower limit as defined by AGL.

Thus, the correct choice aligns with both the specified ceiling of 3,000 feet MSL for the Class C airspace and the lower limit of 2,100 feet AGL, illustrating an understanding of the dimensions and regulatory stipulations of the airspace classification in question. This encompasses both altitude markers as part of the regulated airspace above Metropolitan Oakland International.