At the museum, Mrs. Dodds exploded into yellow powder after Percy —.
A. poured Nancy Bobofit’s applesauce onto the floor, causing Mrs. Dodds to slip
B. flipped the switch that flooded the display room with light
C. hit her with the sword that had been a pen when Mr. Brunner tossed it to him
D. pushed her into the pool at the bottom of the odd-shaped fountain