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單項(xiàng)選擇題

Last december you erected a bridge link between two buildings on your campus. it is now april and the foliage in the trees is full, and the bridge link will no longer maintain connectivity.
Which action will most likely solve the problem?()

A.change the channel selection.
B.install higher gain antennas.
C.raise the antennas.
D.increase transmitter power.

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