A.
冲积扇规模大、分选性和磨圆度高 | Alluvial fan is larger, has better sorting and roundness.
B.
冲积扇规模大、分选性和磨圆度低 | Alluvial fan is larger, has poorer sorting and roundness.
C.
冲积扇规模小、分选性和磨圆度高 | Alluvial fan is smaller, has better sorting and roundness.
D.
冲积扇规模小、分选性和磨圆度低 | Alluvial fan is smaller, has poor sorting and roundness.