Those are really wacky answers to choose from. It isn't B.They are usually man made. It's not C. we still need to be careful. It is not D. It is always your responsibility for whatever you do. It shouldn't be A, but that would kind of make sense. I would choose A.
I say c. cause it is show casing more then one
The toddler is likely to learn and acquire something more in the zone or layer of proximal development if and only if the tasks given to them are more challenging or more difficult that their age can do. The are triggered to think harder to complete the task since it was common for to them to insist and push the things they wanted to have regardless if how hard it can be. Such as 5-year-old kid is given toys and books that are supposed for 7-10 years old. Or a 10-year old kid is assigned to do household chores that his older brother or sister has been doing.
They stay together, through good times and bad