D) He challenged the Espionage Act, which is a constitutional law
<span>Experiments</span>
An experimental research entails a
controlled test of a cause-and-effect relationship that researchers suspect
exists. Experiments involve a researcher directly controlling or manipulating
changes in the independent variable by exposing participants to the treatment
conditions. It is undertaken to make a discovery or test a hypothesis
<span>Parents who discuss and negotiate family rules are especially likely to raise children who are self-reliant, as those discussions and negotiations encourage the children to rely on their own resources and abilities rather than the resources and abilities of others.</span>
The answer is B for a higher education