What type of writing does this passage belong to
A) Exposition. C) Narration.
B) Argumentation. D) Prose.

A．All of the top CEOs in America graduate from colleges that are not very elite.
B．It is completely unnecessary to attend elite colleges if one wants to succeed.
C．Elite colleges usually cannot provide excellent graduates for the society.
D．Still a part of top American CEOs are top elite colleges' graduates.

A．Sandstorms have caused serious problems to the environment.
B．Sandstorms usually bring yellow sand when they occur.
C．Sandstorms always happen every now and then in the history.
D．Nowadays, sandstorms are mostly caused by men.