单项选择题
Lastdecemberyouerectedabridgelinkbetweentwobuildingsonyourcampus.itisnowaprilandthefoliageinthetreesisfull，andthebridgelinkwillnolongermaintainconnectivity.Whichactionwillmostlikelysolvetheproblem？（）
A.changethechannelselection.
B.installhighergainantennas.
C.raisetheantennas.
D.increasetransmitterpower.