The statement "The spider is going to eat the fly" is an opinion.
Answer: Option C
Explanation:
The opinion presented may refer to subjective cases in which there are no definitive conclusions, or it may refer to facts contested by a logical misunderstanding that a person has the right to his own opinion.
A formal expression is like a belief, decision or attitude to something: think about something. From these, we can check with the given options. Concluding, statement in option C tells that attitude of spider (means eating the fly) or a decision about what the spider will be going to do.