Which of the following are true?

a$.$ Critical thinking is the process of identifying, analyzing, evaluating, and constructing reasoning in deciding what conclusions to draw or actions to take.

b$.$ Critical thinking requires us to find fault with things and is relatively unconcerned with the objective application of criteria.

c$.$ Both $\text{'}$a$\text{'}$ and $\text{'}$b$.\text{'}$

d$.$ Neither $\text{'}$a$\text{'}$ nor $\text{'}$b$.\text{'}$