Which of the following is evidence for a critical period for language acquisition?

Question

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The fact that children who are denied access to language (such as through neglect or isolation) often have difficulty mastering language skills in later life suggests that there may be a critical period for language acquisition, during which language skills are most easily developed. This is evidence for a critical period for language acquisition.

B, C, and D are not evidence for a critical period for language acquisition. B suggests that deaf children can still learn to speak, but does not speak to the idea of a critical period. C actually contradicts the concept of a critical period, as it suggests that adults are better at acquiring languages than children (when in fact, the critical period theory suggests the opposite - that language acquisition may be more difficult outside of a certain early window of time). D is also not evidence for a critical period, but rather a misconstrual of how children learn vocabulary (they do not necessarily need to learn to read in order to develop a large vocabulary).

Which of the Following Is Evidence for a Critical Period