In Many Developing Countries,children Become Valuable as Factory Workers in Middle

In many developing countries,children become valuable as factory workers in middle childhood because of their ____.

A) abilities to perform gross motor tasks such threading a needle on a sewing machine
B) cognitive abilities to perform complex conceptual tasks such as designing products
C) emotional stability because some adult factory employees are hot-tempered
D) abilities to perform intricate fine motor tasks such as weaving rugs