What is the correct way to combine sentences A and B.A. She made a vase in art class.B. Her mother thought it looked more like a candle holder.

A. She made a vase in art class, so her mother thought it looked more like a candle holder.
B. She made a vase in art class, and her mother thought it looked more like a candle holder.
C. She made a vase in art class, but her mother thought it looked more like a candle holder.
D. She made a vase in art class, so, her mother thought it looked more like a candle holder.