The correct answer is option C - Juanita cannot be tried again because this would violate the ban on "double jeopardy".
The principle of double jeopardy protects individuals from being tried for the same offence more than once. Once a person has been acquitted (found not guilty) of a particular crime, they cannot be retried for that same offence, even if new evidence comes to light later. The idea is to prevent the government from subjecting individuals to repeated prosecutions for the same alleged conduct.
There are some exceptions to the double jeopardy rule. For example, if there is a mistrial (a trial that is terminated without a verdict), the prosecution may be allowed to retry the case in certain circumstances. Additionally, double jeopardy does not apply if a person is facing both criminal and civil proceedings for the same conduct.
The principle promotes the finality of legal judgments and prevents the government from subjecting individuals to repeated prosecutions for the same alleged conduct.