Step 1: Concept
Different types of chains are used in surveying for various purposes.
Step 2: Meaning
A Revenue chain is specifically used for cadastral (land ownership and tax) surveys.
Step 3: Analysis
It is 33 feet long and consists of 16 links. For comparison, Gunter's chain is 66ft and the Engineer's chain is 100ft.
Step 4: Conclusion
The length is 33ft.
Final Answer: (D)