Accumulations of Gold, Platinum, or Silver Would Most Likely Be

Accumulations of gold, platinum, or silver would most likely be found:

A) distributed evenly throughout the stream bed.
B) in point bars on the inside of meander curves, where stream velocity is the slowest.
C) on the outside of meander curves, where the high velocity of the water has embedded them in the banks.
D) in potholes in the stream bed because their high density would cause them to sink lower than other sediments.