下列关于燃烧现象的描述中正确的是( )
A:木炭在空气中燃烧后,生成黑色的固体
B:铁丝在氧气中燃烧发出明亮的火焰
C:镁条在空气中燃烧,发出耀眼的白光
D:红磷在空气中燃烧,产生蓝紫色火焰
— Children today find it hard to focus on study.
— Exactly, as they ________ so many fun things to do.