The second one where it starts with Math class
Answer:
Many teachers use the internet to increase learning in the classroom.
Explanation:
a counterargument is the comeback from the argument. It is what the opposing side of an argument would say one response to the first side.
In this case, the main argument is that too much time on the internet means lower test scores. What is the opposite of that argument, something the opposing side would say? Teachers use the internet as a tool to make learning better for students.
The answer which is an example of a theme with a dual nature is D. people who work hard learn values but may not prosper.
The other sentences are pretty linear and expected - a person works hard and is successful in life. D is somewhat different, which is why it has two natures, or a dual nature.