Please choose the correct answer to fill in the blank.
Tom: Jenny, jīntiān tiānqì zěnmeyàng?
Tom: Jenny, 今天 天气 怎么样？
Tom: Jenny, how’s the weather today?
Jenny: Jīntiān____.
Jenny：今天_____。
Jenny: It’s rainy today.
A. 是下雨(shì xiàyǔ)
B. 是雨(shì yǔ)
C. 下雨(xiàyǔ)