Answer:
a. critical thinking
Step-by-step explanation:
Critical thinking refers to the analysis and evaluation of information you make to form your own judgement.
Logic means getting to a conclusion by evaluating the validity of certain statements.
Observation refers to the process of watching something.
Prediction is what you think is going to happen.
So, according to this definitions and considering that you are comparing two pieces that provide conflicting information on a topic, you are evaluating both to create your own opinion which means that you are using critical thinking.