What is the basis of the theory of learned optimism?
a. when a route is blocked, people find alternate pathways to their goals.
b. people make attributions or explanations about the things that happen to them.
c. people succeed when they believe in their capabilities to produce desired effects.
d. optimism is the belief that good rather than bad things will happen.

a. When a route is blocked, people find alternate pathways to their goals.

Explanation:

We know learned optimism as defined by Martin Seligman in his famous book, Learned Optimism.:

Learned optimism is an hability that can be developed just as any other talent, and it is done by challenging negative outputs and consciously finding alternate pathways to goals.

If an unlucky situation happened, then it wont be taken personal, seen as a set back , which is not permanent and there are many goals, that are there to pursuit.  

We can witness bad events , but they are temporary and we are not to blame ourselves, since caused outside are out there.

this is not a question

answer; elasticity of the lungs decreases;