Answer:
The answer to your question is: third option
Step-by-step explanation:
a) Highlight something is useful but it will not help to communicate better the results if people do not understand the experiment.
b) Change the units of pressure will not help to communicate better the results if we do not understand what the experiment is.
c) Make a graph will help us to communicate better the results because it will be easier to understand tendencies.
d) It will be easier to graph the data than present less results of the experiment.