A is corrent because engagement performance is an element of quality control (the others are [1] leadership responsibilities for quality within the firm; [2] relevant ethical requirements; [3] acceptance and continuance of client relationships and specific engagements; [4] human resources; and [5] monitoring).
B is incorrect because technology selection is not a quality control element.
C is incorrect because professional skepticism is not a quality control element.
D is incorrect because information processing is not a quality control element.
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