Answer:
B) heighten the impact of the phrase
Explanation:
The em dash acts as a pause for the reader, emphasizing the next phrase by isolating it in the conclusion sentence.
<span>An experiment designed so that you can observe the differences between the experimental group and the control group.
In each experiment there have to be two groups - an experimental one (which has a different variable), and a control group. Both of these groups are subjected to the same thing except for that variable you are trying to test via an experiment.
</span>
What are they can’t answer if I don’t have the question
Im almost positive D is the correct answer.
