Read the text and choose the correct answer

My name is Phong. I am preparing for the summer holiday with my parents. Tomorrow we are going to Ha Long Bay. We are going to stay in a beautiful hotel. My mother is going to lie on the beach and listening to music. My father is going to swim. He is a good swimmer. He loves swimming very much. My brother is going to build sandcastles. He is interested in building them. I don't like building sandcastles but I am going to eat seafood. I love seafood. It's so delicious.

What is Phong doing? - He is preparing for the ______ holiday with his parents.

• A. 
  summer
• B. 
  winter
• C. 
  fall
• D. 
  spring