Help ASSAP what is the meaning of the word"contaminate"

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Which is guaranteed by the fifth amendment? o a person will have a speedy trial. or a person can refuse to testify against himself or herself. a person can not be forced to testify against his or her spouse. a person has the right to a trial by jury

The directory was unsuccessful and was eventually replaced because no constitution had been created that outlined its authority. it was connected with the reign of terror. its members did not get along with napoleon. the national convention did not agree with the directory's decisions.

The rise of advertising in the 1920s. i am good with seeing how advertisements shape the roaring twenties and how it developed a new way of life through modern days. but i am not sure what the details of advertising in the 1920s were. if possible can you send me links (preferrably credential links) to sources that maybe show like the first company to start advertising through the radio, how advertising benefits (statistics graphs), etc.