I hope people are more careful and cautious when coming into contact with others.
C is the complex sentence because it contains the word while and an independent and dependent clause! :)
The supreme court decision in Plessy Vs Ferguson is unconstitutional because THE SUPREME COURT RULING ALLOWED STATES TO DENY EQUAL PROTECTION TO ANY PERSON WITHIN ITS JURIDICTION.
The supreme court ruling which upholds the segregational law of the state of Louisiana is considered unconstitutional because it acts contrary to both the 13th amendment, which abolished slavery and 14th amendment, which prohibit some restrictive legislation on the part of the state.