In the following sentences, two words are omitted. Choose the correct option that can fill the blanks both contextually and grammatically.  The architectural __________ of the old library, though slightly worn by time and neglect, hinted at a past era of intellectual __________.

A. Plainness, noise • Plainness – simple, not decorative • Noise – loud or unpleasant sound B. Grace, energy (Correct) • Grace – beauty, elegance, pleasing style • Energy – lively force, active spirit C. Weight, routine • Weight – heaviness or seriousness • Routine – something done regularly, often without thought D. Height, skill • Height – tallness • Skill – ability or talent E. Style, habit • Style – manner or appearance • Habit – repeated behavior “Architectural grace” naturally describes an old building that still retains beauty. “Intellectual energy” captures the sense of an active, thriving scholarly past.