After Taking Time Off for 20 Years to Raise Her

After taking time off for 20 years to raise her children,Loretta decided to go back to college to get a degree.She was nervous about being away from an educational environment for so long,and many things had changed,but after a few rough weeks she was able to get comfortable and scored a 96 on her first exam.What enabled Loretta to succeed in this new life experience? 

A) resilience
B) plasticity
C) social clock
D) maturation