The correct answer is: C. Block Section
Slip siding is a type of siding that is used to protect the ends of a block section. It is made of a durable material, such as metal or plastic, and is designed to withstand the elements. Slip siding is typically installed at the top and bottom of a block section, and it helps to prevent water and debris from entering the block.
A station section is a section of track that is between two stations. A station limit is the point at which a train must stop before entering a station. A siding is a track that is used to allow trains to pass each other or to stop for loading and unloading.
Here is a diagram of a block section:
[Diagram of a block section]
As you can see, the slip siding is located at the end of the block section. It is designed to protect the end of the block from damage.
I hope this helps!