The answer is C. To sign 11, you flick your pointer finger up twice. To sign 44, you have the handshake "4" and bounce it right to left.
Deaf culture is the set of social beliefs, behaviors, art, literary traditions, history, values, and shared institutions of communities that are influenced by deafness and which use sign languages as the main means of communication.
So they could be prepared to be adults. Boys and girls were expected to absorb the community's values, including stoicism in the face of hardship, and master the skills necessary to survive and thrive.