—What's the matter, madam?

—_________ [ ]

A. I am looking for some vegetables.

B. How much are the tomatoes？

C. Which one is your bag?

D. I can't find my son's address.

We must make ( ) that the goods were packed in gunny bags of 50kgs net each.

A．clear

B．it clear to you

C．clear to you

D．it is clear