At 80 years of age, when Arthur Rubinstein, the Polish American classical pianist was
interviewed, he said that he spent more time at practice than earlier in his
life, and this helped to maintain his status as an admired concert pianist. The aspect of Baltes' theory that this reflects is OPTIMIZATION.
Punishments for not following slave codes were severe because;
B.) Slaves were seen as property and not as humans
Fearing rebellion, slave codes were created to keep slaves subservient and fearful.