The correct answer is higher!
(alrernatively "more" would also be ok, but not "more high")
The only correct form of comparative for high is "higher".
Answer:
A
Explanation:
to summarize the events that his book will cover
sorry if its wrong it was my best guess :/
A February, 2002 report from the National Academies of Science concluded that while reproductive cloning is unsafe and should be banned, therapeutic cloning has sufficient scientific potential that it should be allowed to continue.