That statement is true
Theory usually created after we find a result of our experiments. It is used to provide some sort explanation that become the foundation that explain why the experiment provide that current result. This initial explanation should be researched further through additional experiments in order to be verified.
The unauthorized disclosure of Secret information could reasonably be expected to cause serious damage to national security. The unauthorized disclosure of Top Secret information could reasonably be expected to cause exceptionally grave damage to national security.
Of what?
Here is the definitions
Disadvantages: an unfavorable circumstance or condition that reduces the chances of success or effectiveness
Advantages: a condition or circumstance that puts one in a favorable or superior position.
An action against another party is known as asn opposition
B)Opposition