The Primary Difference Between a Delta and an Alluvial Fan

The primary difference between a delta and an alluvial fan is that:

A) alluvial fans result from deposition into inland lakes, while deltas result from deposition into the ocean.
B) alluvial fans are erosional features, whereas deltas are depositional features.
C) alluvial fans are formed on low- land plains, while deltas are formed in a standing body of water.
D) alluvial fans form at the source of a stream and deltas form at the mouth of a stream.