关于动能武器根据武器平台分类的错误叙述是（）。

A.天基动能武器

C.陆基动能武器

B.空基动能武器

D.反舰动能武器

The establishment of INMARSAT as an independent organization marked a great step forward for maritime radio communications. What does “marked a great step” mean in the sentence?（）

A.To run faster than ever

B.To go forward

C.To march without stopping

D.A significant symbol of a great improvement in maritime communication