What race-related problems existed for african-american sol-diers who served in the vietnam war?

B. probable cause.

Explanation:

Though the Fourth Amendment of the US Constitution provides the right against unreasonable searches and seizures by the government, it may not always guarantee such right at all times.

There is a legal term called 'probable cause' which establishes that the government may search or seize objects of interests if there is a good reason to believe that a location contains evidence or involves government's interests.