Which example best displays an anxious mood?

a. the windows sparkled welcomingly as the curtains snapped merrily in the soft breeze of the evening.
b. the doorbell chimed a playful tune, sending a lively sound that reverberated through the lazy household.
c. the sound of the clock striking midnight quivered through the icy hallways, startling the restless house.
d. the afternoon breeze tickled the curtains, causing them to dance to a pleasant song of whispered delight.