Alaskan rivers that are fed by the melted water of glaciers tend to be very cloudy, almost milky. What makes the water so cloudy
a. Tiny bits of weathered, very fine rock from the glacier are suspended in it.
b. Soil that eroded from the river banks mixes into the water and clouds it.
c. Acidic glacial ice weathers limestone into a chalky powder, which clouds the water.
d. Millions of microorganisms living in the ice stay suspended in the river water.