That would be the nervous system.
Blind spots in large animals are normally directly down, behind, or up. So i think its b.
Explanation:
Disadvantages –
Lack of One-On-One Time : Some argue it's best to keep young children at home for most of the years before formal schooling begins (at least until the age of three). ...
Specific Hours/Days : ...
Learning too Early : ...
Limitations on Creativity and Free Exploration : ...
Learning too Early