According to Michigan V

Multiple Choice

According to Michigan v.Sitz (1990) ,do DWI roadblocks constitute unlawful stops?

A) Yes,they are unlawful stops unless the individual stopped has already demonstrated some subjective symptoms of driving while under the influence.
B) No,they are not unlawful as long as the police have a warrant to search 'all vehicles' suspected of DWI suspects.
C) Yes,they are unlawful based on the Fourth Amendment 'unreasonable' test.
D) No,they are not unlawful because there is a compelling interest related to public safety.