ME2. Did you attend pre-school or the CAIF? (understood as attends or attended)
You must indicate the code that corresponds. The CAIF are Centers of Attention to the Infancy and the Family, which are for children younger than 4. If he assisted the CAIF as well as pre-school, don't forget to circle the code that corresponds to both options (and not each one of them separately). You must ask this question of everyone ages 6 to 17.