Why Are Sand-Sized Particles Easier to Erode Than Clay-Sized Particles

Multiple Choice

Why are sand-sized particles easier to erode than clay-sized particles?

A) because sand grains are rounder and roll more easily,whereas clay particles are flat and platy
B) because sand grains are typically made of quartz,which saltates more easily than clay particles
C) because clay particles are denser than sand particles,making them heavier
D) because clay particles are attracted to tone another because of opposite charges,which hold them in place