Explanation: For normal wideband FM (WBFM) voice operation on VHF and UHF, the standard maximum frequency deviation is **5.0 kHz**. This deviation level provides excellent audio fidelity for voice communications while efficiently utilizing the assigned channel bandwidth, typically 20 kHz or 25 kHz. This 5.0 kHz deviation, combined with a typical maximum voice audio frequency of 3 kHz, results in a transmitted bandwidth of approximately 16 kHz according to Carson's Rule (2 * (deviation + highest audio frequency)), fitting well within common channel spacing. * **A) 2.5 kHz** is the maximum deviation for *narrowband FM* (NBFM), which uses less spectrum and is often found on channels with 12.5 kHz spacing. * **C) 7.5 kHz** and **D) 10 kHz** would be considered excessive for normal voice, leading to wider bandwidths that could cause interference to adjacent channels and are not standard practice for typical amateur wideband FM voice.