The correct matches are as follows:- (A) We waited with bated breath for the winner to be announced.- (B) Moving quietly into position, she baited the trap and waited.- (C) You ought to make a few discreet enquiries before you sign anything.- (D) Organisms can be divided into discrete categories.
• (A)- (IV): Incorrect; ”baited” does not fit here.
• (B)- (III): Incorrect; should be ”baited” but needs to match the respective sentence.
• (C)- (II): Correct; ”discreet” refers to being careful and circumspect.
• (D)- (I): Correct; ”discrete” means separate and distinct.