[单选题]
A 10-kg piece of aluminum sits at thef.:j :out yq(ks/hsnkhv c3w8jk.+o 6 bottom of 1qj(el9gp*,v- udvena lake, right next to a 10-kg piece of lead. Which has the greater buoyant force *e1-vndljg( p9u ev,q on it?
A. the aluminum
B. the lead
C. Both have the same buoyant force.
D. cannot be determined without knowing their volumes