Select the correct option for the space numbered 21 in the above passage

  Publishing is the fast growing business in Nigeria and there are therefore, many publishing houses all over the country. When ……..16……..[A. an article B. an essay C. a book D. a manuscript]. is submitted by an author, the publisher sends it to ……..17……..[A. an assessor B. an evaluator C. a checker D. an examiner] to know if it is actually publishable. This is important because the publisher wants to make sure that the book catches the ……18…..[A. market B. audience C. students D. shops] when it is eventually published. In a good publishing house, there is …….19……[A. an error-proof B. an editor C. a lithographic D. an evaluation] section which is concerned with……..20……[A. proof-reading B. reading over C. scanning over D. skimming over] the manuscript and correcting both the spelling and typing errors. After this, the manuscript is ………21…….[A. typewritten B. typeset C. double-spaced D. single-spaced] in readiness for …….22…..[A. photocopying B. Xeroxing C. filming D. printing].

  The printed ……..23……[A. items B. bulletin C. copies D. specimen] are then stored in the warehouse and a few of them may be sent to the author as ……..24……[A. complementary B. complimentary C. acknowledgement D. sample] copies. Since it is not just the aim of the publisher to offset the cost of production but also to make some gains, there is a strong marketing division which promotes sales. A certain percentage of the cover price of the book is paid to the author as ……..25……[A. royalty B. honorarium C. dividend D. interest].