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Among the choices, option B. Hasn't, is a singular contraction. "Hasn't" is the shortened word for "has not". The rest of the choices are plural contractions: Don't from do not, Haven't from have not, and Weren't from were not.
The answer choice which is a singular contraction among others is; Choice B; Hasn't.
Which answer choice is a singular contraction?
A contraction as the name implies is a shortened version of the spoken and written forms of a word, syllable, or word group, created by omission of internal letters and sounds.
The singular contraction in this case is Hasn't as it emerges from the words Has and Not and since, has is a singular verb.
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