Abnormal means different or odd, not normal. significant means "of great importance" or very important/greatly appreciated. I hope that helps you!
The Supreme Court decision that was rendered invalid by Brown vs. the Board of Education was Plessy vs. Ferguson. In this case, the Supreme Court ruled that racial segregation of facilities was constitutional as long as the facilities were equal in quality. However, this was rendered invalid by Brown vs. Board of Education in which racial segregation was ruled unconstitutional.
I believe the answer to this question is option B Schizophrenia.
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Explanation:
