💡 Detailed Explanation
M informs N that the manager has high expectations for the project. N acknowledges this with "承知しております" (I understand/I am aware) and expresses their commitment to meet those expectations using humble and polite language ("ご期待に沿えるよう、尽力いたします" - I will do my best to meet your expectations). This is a highly appropriate and respectful response in a business or formal setting. The distractors are subtly incorrect in nuance or level of commitment: "存じております" is humble but "できる限り頑張ります" is less formal and committed than "尽力いたします". "お伺いしております" implies hearing rather than full understanding/awareness, and while "努力いたします" is effort, "尽力" implies a more comprehensive, all-out effort, and "〜べく" is N1 grammar.