Which of the Following Is True of Activity Theory

Which of the following is true of activity theory?

A) It states that successful aging depends on three main factors: selection, optimization, and compensation.
B) It states that adults become more selective about their social networks as they grow older and place a high value on emotional satisfaction.
C) It suggests that older adults should identify and reflect on the positive and negative aspects of their lives.
D) It states that adults who cannot carry on their middle-adulthood roles into late adulthood should find substitute roles that keep them engaged.