单选题 Media organizations can be called before a tribunal if they fail to operate ______ the guidelines laid out by federal legislation.

【正确答案】 A

【答案解析】根据guidelines laid out by federal legislation(联邦立法的方针)，可推测句意应为“媒体机构的运作不遵守联邦立法的方针时，会被法庭传唤”，因此(A)within(在…之内)最恰当。