Please choose the correct answer to fill in the blank.
Liú Huá: Nǐ xué Zhōngwén duō jiǔ le?
刘 华：你 学 中文 多 久 了？
Liu Hua: How long have you been learning Chinese?
Richard: ____.
Richard: Two and a half months.
A. 两个半月(liǎng’gè bàn yuè)
B. 二个半月(èr’gè bàn yuè)
C. 两个月半(liǎng’gè yuè bàn)