Lake Pitch is the world's largest natural asphalt site, which is estimated to contain 10 million tons. It is located in La Brea in the southwest of Trinidad, within the Siparia Regional Corporation. The lake covers about 100 acres and is reported to be 250 feet deep. [1]
Pitch Lake is a popular tourist attraction, including a small museum, from where official tour guides can accompany people across the lake. The lake is extracted from asphalt by Lake Asphalt of Trinidad and Tobago.
I think that the answer for "site" should be c. location.
