When you put observations together with what you already know you make an: C. Inference.
An inference can be defined as an act that involves putting observations together with an already existing knowledge to deduce a message or meaning from something through induction. Thus, an inference typically involves combining observations with what you already know.
A prediction involves talking about something or an event that is likely to happen in the future.
A hypothesis is simply a tentative or an educated guess which is a testable explanation for an observation.
An opinion can be defined as an unverified or unreliable claim about something.
In conclusion, when observations are put together with what you already know, you make an inference.
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