Many investors base their choice ( between bonds and stocks on comparing bond yields to ) the dividends available on common stocks. A. between bonds and stocks on comparing bond yields to B. among bonds and stocks on comparisons of bond yields to C. between bonds and stocks on comparisons of bond yields with D. among bonds and stocks on comparing bond yields and E. between bonds and stocks on comparing bond yields with 选项明显的差距就是between and以及compare with，所以选了E，答案是C。麻烦老师讲解一下comparing和comparisons of的区别。