In areas where the state and federal governments have concurrent authority, the federal government can decide to regulate that area exclusively. in such a situation, according to the doctrine of the state law is unconstitutional.

if you have to make a general question and respond to your thoughts, then this isn't really a question someone can you on. read the passage, form your question, and answer using your thoughts. no one else can understand how you interpreted this text if you don't tell us.