The correct answer is: C. Intercepting sewer.
An intercepting sewer is a sewer that receives the discharge of a number of house sewers. It is usually located at the edge of a neighborhood or development and carries wastewater to a larger sewer or treatment plant.
A house sewer is a sewer that connects a building to the main sewer line. It is usually located underground and is made of PVC, cast iron, or concrete.
A lateral sewer is a sewer that connects a house sewer to an intercepting sewer. It is usually located underground and is made of PVC, cast iron, or concrete.
A sub-main sewer is a sewer that connects an intercepting sewer to a larger sewer or treatment plant. It is usually located underground and is made of PVC, cast iron, or concrete.