The answer would be B. Radio waves have long wavelengths and Gamma Rays have shorter wavelengths. Radio waves have larger wavelengths than Gamma rays. I hope this helps:)
Answer:
The largest functional difference between the late republic and the early imperial government was essentially that the republic was unable to control the vast empire while the imperial system could. ... Indeed much of the key expansion of the Roman Empire occurred while it was still a Republic
I'm almost sure that the term is a directory.