The correct answer is: [D]:
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"He was not able to communicate with others."
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Note:
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Choice [A]: "In September 2015, Zejd was 6."
This was not Zeid problem in school; so this choice is incorrect.
Choice [B]: "Zejd Coralic is a young boy who lives in Sarajevo."
Again, this was not Zejd's problem in school; so this choice is incorrect.
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Choice [C]: "He started first grade."
Again, this was not Zejd's problem in schoo; as such, this choice is incorrect.
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We are left with:
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Choice [D]: "He was not able to communicate with others."
This was Zejd's initial problem in school; as such, this is the correct choice.
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