I. Distinguish Labor-Only contracting and Job-Only contracting. (5%) A deadlock in the negotiations for the collective bargaining agreement between College X and the Union prompted the latter, after duly notifying the DOLE, to declare a strike on November 5. The strike totally paralyzed the operations of the school. The Labor Secretary immediately assumed jurisdiction over the dispute and issued on the same day (November 5) a return to work order. Upon receipt of the order, the striking union officers and members, on November 1, filed a Motion for Reconsideration thereof questioning the Labor Secretary's assumption of jurisdiction, and continued with the strike during the pendency of their motion. On November 30, the Labor Secretary denied the reconsideration of his return to work order and further noting the strikers' failure to immediately return to work, terminated their employment. In assailing the Labor Secretary's decision, the Union contends that: The Labor Secretary erroneously assumed jurisdiction over the dispute since College X could not be considered an industry indispensable to national interest; The strikers were under no obligation to immediately comply with the November 5 return to work order because of their then pending Motion for Reconsideration of such order; and The strike being legal, the employment of the striking Union officers and members cannot be terminated. Rule on these contentions. Explain. (5%)