—No, she ________.
A:Is; is
B:Is; isn't
C:Are; aren't
twelve-seven=____
①自觉承担历史责任 ②克服冷漠情绪和看客心理
③伸张正义,将主要精力用于揭露社会问题 ④明辨是非,自觉抵制某些不良社会风气