In each of the following questions, a sentence is given with two blanks. Choose the combination of words that best fits into the blanks, rendering the sentence grammatically correct and contextually meaningful.  The legislative committee noted that the proposed deregulation bill was an exercise in ______ ; ostensibly designed to foster competition among smaller enterprises, its complex labyrinth of clauses actually contained provisions that would only further ______ the market dominance of existing oligopolies.