067E B
 Which statement concerning Inmarsat-B and Inmarsat-C terminals is correct?
a) Both Inmarsat-B and Inmarsat-C units are subject to shadowing effects due to their omni-directional antennas. 
b) Both Inmarsat-B and Inmarsat-C  units are subject to shadowing effects, but Inmarsat-B units have directional antennas. 
c) Both Inmarsat-B and Inmarsat-C units are subject to shadowing effects, but Inmarsat-C units have directional antennas. 
d) Both Inmarsat-B and Inmarsat-C units are subject to shadowing effects, due to their directional antennas. 
