Question: "My kids really understand solar and earth-heat energy," says a second-grade teacher in prefix = st1 /Saugus,California, "Some of them are building solar collectors for their energy course." These young scientists are part of City Building Educational Program (CBEP) , a particular program for kindergarten through twelfth grade that uses the stages of city planning to teach basic reading ,writing and math skills , and more . The children don't just plan any city . They map and analyze  the housing , energy , and transportation requirements of their own district and foretell its needs in 100 years . With the aid of an architect  who visits the classroom once a week , they invent new ways to meet these needs and build models of their creations . "Designing buildings of the future gives children a lot of freedom," says the teacher who developed this program. "They are able to use their own rich imagination and inventions without fear of blame , because there are no wrong answers in a future context . In fact , as the class enters the final model-building stage of the program , an elected "official" and "planning group" make all the design decisions for the model city , and the teacher steps back and becomes an adviser ." CBEP is a set of activities , games , and imitations that teach the basic steps necessary for problem-solving ; observing , analyzing, working out possible answers , and judging them based on the children's own standards . The children feel free in the program because_. A) they can design future buildings themselves B) they have new ideas and rich imagination C) they are given enough time to design models D) they need not worry about making mistakes
Answer:
D