That would be a claim because it is stating something that would require evidence in order be shown as fact or not.
A.because the rest has nothing do with colloquialism
The statement that does not support the conclusion that Hamlet is a complex character is : Hamlet is intelligent and attended university at Wittenberg. Surely, all the events that occurred during Hamlet's period of being a Wittenberg student is a significant point of the plot that has influence on the whole story. But, the question is to find a characteristic which does not describes the main character as complex, and this option is not suitable in this case. This is the only option that contains a fact from his life but does not reflect how versatile and dynamic Hamlet is.
Dinner is almost ready so please put your phone away and don’t look at it again