The correct answer would be d
Answer
Proliferation of public lectures
Explanation
Public lecture is a a method which is normally used for the purposes of educating people or the members of the public.It is normally done by prominent experts in a certain field. In spreading knowledge and ideas in eighteenth century colonial cities used proliferation of public lectures. In the 19th century, the popularity of the public lectures given by professionals and the experts. Public lectures was important in promoting and spreading knowledge .and ideas.
you answer would be B) world war 1
