Ralph Reitan Shied Away from Writing Textbooks Because He Felt

Ralph Reitan shied away from writing textbooks because he felt that

A) students had no basis of comparing his "readable" writing from other, difficult-to-get-through books.
B) his writing style was better suited to publication in scholarly journals.
C) he could do more good by personally presenting at scientific meetings.
D) writing textbooks should be reserved for the end of one's career.