题目内容：
Whichkindofperceptualjudgmentdoesthebrainmakewhensensingaphonevibration? A．Ithastodecidewhetherthephoneisinsidethepocket.
B．Ithastodecidewhethertheincomingsignalsarefromthephone.
C．Ithastodecidewhetherthesignalsfromtheskinindicatethefact.
D．Ithastodecidewhethertheincomingsignalsarefromtheskin.
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答案解析：