_____ is very useful for us students _____ English well. [ ]

A. This, to learn

B. That, to learn

C. It, to learn

D. It, learns

Which of the following statements accurately describes direct and dealer paper（）

A. The majority of direct paper issuers are financial companies.

B. Direct paper is rated, whereas dealer paper is not.

C. Direct paper tends to incur more issue costs versus dealer paper.