[单选题]
The binding energy per *sc0f f:muv rnpjgaz9r5v065 yn)z*n. * g *bbxb d6m6)fzgkqd0. motnucleon
A. increases steadily as we go to heavier elements.
B. decreases steadily as we go to heavier elements.
C. is approximately constant throughout the periodic table, except for very light nuclei.
D. has a maximum near iron in the periodic table.