Read the passage carefully and answer the questions

David and Lucy live in London, in England. They have a big house near a park. There are three bedrooms and two bathrooms in their house. David and Lucy have two children: a boy and a girl. David works in a bank. His wife is a doctor. They usually leave home at eight o'clock. Their two children go to school by bus. Lucy goes to her hospital by her car. In the evening, Lucy always cooks dinner. After dinner, they watch TV.

How many children do David and Lucy have?

• A. 
  They have three children.
• B. 
  They have one child.
• C. 
  They have two children.
• D. 
  They have four children.