Answer:
a. Easier access to printed matter and increased literacy
b. Advances in science and technology
Explanation:
Cross pollination of ideas refers to a situation where it is really easy for people from different regions, backgrounds, or culture to come together and exchanging the knowledge that they possess.
Easier access to printed matters and advances in science and technology allow people to send information to another location far away within a very short period of time (I.e : internet) , which definitely positively contributed to the cross pollination of ideas
