Why did early christians develop symbols to identify themselves to each other?

What best explains why the us government placed restrictions on asian immigration through angel island? many americans did not believe in assimilation. many americans did not approve of the gentleman’s agreement. many americans held nativist or racist views. many americans feared a loss of educational opportunities.

31/3: which equation has the solutions x =?

What change took place in the african slave trade in the 1500's?