Read the following lyrics:
"In the quiet hum of the city lights, I search for a melody that resonates with my soul. Every note a whisper, every chord a memory of a time when laughter filled these empty halls. Now, only echoes remain, a bittersweet symphony of what once was."
What is the underlying emotion conveyed by these lyrics?
A) Joy and excitement
B) Hope and anticipation
C) Nostalgia and melancholy
D) Anger and frustration
E) Indifference and apathy