宇航员在某一星球上以速度V₀竖直向上抛出一小球，经过时间t，小球又落到原抛出点，然后他用一根长为l的细绳把一个质量为m的小球悬挂在O点，使小球处于静止状态．如图所示，在最低点给小球一个水平向右的冲量I，使小球能在竖直平面内运动，若小球在运动的过程中始终对细绳有力的作用，则冲量I满足什么条件？

The result was far beyond ____ we had expected, ____ brought great joy to every one of us.[ ]

A. that; which

B. than; that

C. what; what

D. what; which