What determines whether a carbohydrate is digestible or indigestible?

Digestible contain less complex molecules and so the body can break them down. Indigestible are complex molecular chains and the body has difficulty breaking them down

The answer is d. when it begins to fall back to the child's hand

Iam not sure but to me it with be a or dsorry if i was late! hope this ! : )if you really want me to find out the answer that is correct tell me and i will do more research but the a or d makes sense to me.