已知X、Y、Z为三种原子序数相连的元素，最高价氧化物对应水化物的酸性相对强弱是：HXO₄＞H₂YO₄＞H₃ZO₄。则下列说法正确的是

A．气态氢化物的稳定性：HX＞H₂Y＞ZH₃

B．非金属活泼性：Y＜X＜Z

C．原子半径：X＞Y＞Z

D．原子序数：Z＞Y＞X

When you get on stage for the first time, you may be surprised by ______bright the lights are.

A．what

B．so

C．how

D．too