A Special Chinese Food: Brain of Tofu?

China is known for its many traditional food. How much do you know about them? Here is a test!
All of these are Chinese traditional food for special festivals except .
A. “月饼(yuèbǐng)”
B. “汤圆(tāngyuán)”
C. “粽子(zòngzi)”
D. “豆腐脑(dòufunǎo)”