Answer:
C) You might think that all sets of twins should look alike, but you'd be wrong.
Step-by-step explanation:
The language or the tone of a text refers to the kind of words and writing style used by the author to convey their attitude towards what the text is about.
The formal language can be encountered in business, legal, academic, or professional texts, unlike informal language, which is more subjective. All of the listed examples, except for the example C, are completely neutral, objective, as they are clearly stating facts. There is no familiarity in these statements. Statement C makes an assumption that is not fully objective (although it may be correct in some cases) and is more somewhat more personal, so we can say that it is an example of informal language.