Read the passage below before answering the question.
"Leo's First Concert"
Leo gripped his violin bow tightly. Standing backstage in the school auditorium, his hands felt clammy. Hundreds of eyes were waiting on the other side of the velvet curtain. Leo had practiced his piece, 'Spring Song,' every day after school for three months, but his stomach still fluttered with butterflies. His music teacher, Ms. Rivera, bent down and gave him a gentle smile. 'Remember, Leo,' she whispered, 'play with your heart, not just your fingers. You know every note.' When the stage manager signaled, Leo walked out under the bright warm lights. He rested the violin against his chin, took a deep breath, and played the first note. As the sweet music filled the hall, his fear melted away, replaced by pure joy.
What does the phrase his stomach still fluttered with butterflies mean in this story?
- ALeo felt nervous and excited about performing on stage.
- BLeo swallowed real insects before going on stage.
- CLeo felt sick from eating a heavy lunch.
- DLeo was cold and shivering in the auditorium.