The Golden Gates Bridge has been quite (i)_____ by most aesthetic and functional criteria. However, as a structure it has had some limitations. Shortly after it opened, its roadway proved to be (ii)_____ under certain wind conditions, so it was stiffened. The additional steel that provided that stiffening naturally added weight to the structure, and this made it (iii)_____ later to add a proposed rail system beneath the roadway.
答案：C,E,H