Answer to Question 1
The idea that cognitions influence how we respond to stress is called cognitive primacy.
Answer to Question 2
Although approach coping seems to be the most successful and avoidance coping the least successful, there appears to be no best strategy for every situation. The key is flexibility and the ability to use a wide range of coping strategies to fit the specific context or situation. As Kleinke (2007, p. 305) concludes after reviewing the coping literature, people who cope most successfully are those who are equipped with a battery of coping strategies and who are flexible in adapting their responses to the situation..