Read the passage and answer the question.
Last week, my friends and I organized a surprise party for our teacher, Mrs. Demir. We decorated the classroom with balloons and banners. We also prepared a cake with her name on it. When she entered the room, we shouted 'Surprise!' She was very happy and thanked us. It was a memorable day.
What is **NOT** true according to the passage?
A)The party was for Mrs. Demir.
B)They decorated the classroom.
C)The teacher knew about the party before.
D)They shouted 'Surprise!' when she entered.