高分子的柔顺性增加，以下哪个方面增加（ ）。 A: <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABwAAAAbCAYAAABvCO8sAAAAvUlEQVRIDe2UAQ6DIAxFey4O1PP0NL1MD/MN2wBFB2M2JFswMaiV/+hvgTD5osk8LKC748vSZemwA8emUQYRdW/WYU6ecAaywlL4sYAAyR8MygRHoOzEAZyAAEwgbhmmzNJ4BUyxL8ejpbXIB8Bo8bPue+trofJ+D6iMUApcVBtPt4AmYR4wwvIWClI6u5FdDP1OhnG17paaxJMnvN3ojkAF10fcRZ0cgZ3Kv+z0b5o+d/iPdpcOy/Un/D9wA9/QO6KQesz8AAAAAElFTkSuQmCC" /> B: 结晶能力 C: Tg D: Tm