What he thought and did at school ______ (与这个问题毫无关系).

A．The increasing number of Mexican immigrants is going to stop expanding in the coming years.
B．The Mexican immigration has already resulted in an increase in the number of Spanish speaking people.
C．The Mexican move to the US with the deliberate intention of destroying her culture and political integrity.
D．The Americans do not have to worry about the impact of Mexican immigration at all.