【单选题】

Preprinted leaflets and brochure can be inserted into the newspaper or magazine supple-ments．They are charged per thousand copies against the total quantity distributed．
A．The inserted leaflets and brochure will be found in the magazine．

B．Leaflets and brochure are charged on the basis of the quantity．
C．The inserted leaflets and brochure are charged according to the price of the newspaper．