Public reports by national commissions, governors' conferences, and leadership groups have stressed the great need for better understanding of international affairs by the citizenry. If the country is to remain a leading nation in an era of international competitiveness, the need is undeniable. If there is such a need for the citizenry to have a better understanding of international affairs, then all of our new teachers must be prepared to teach their subject matter with an international orientation. If all of the statements in the passage are true, which one of the following must also be true? ['If the country is to remain a leading nation in an era of international competitiveness, then there is no need for the citizenry to have a better understanding of international affairs.', 'Public reports from various groups and commissions have stressed the need for a more international orientation in the education of teachers.', 'If the country is to remain a leading nation in an era of international competitiveness, then new teachers must be prepared to teach their subject matter with an international orientation.', 'If there is better understanding of international affairs by the citizenry, then the country will remain a leading nation in an era of international competitiveness.']