BH5UWL
The explanation for MC1-0702 is that the signal is right-handed, but this right-handedness is defined with the signal propagation direction as "forward," while "from ground to satellite" is the opposite, so it's left-handed. This is a purely misleading question.
While MC1-0914 might be considered the best, having 6m is definitely the ideal choice. Anyone who has used both will have a deep understanding of their respective advantages.
MC1-0915 definitely has issues; FT4 can be used, but it's never been a mainstream mode for MS.
Furthermore, I believe that option B for MC1-0913 is also correct. The UHF band includes the 432, 1296, and 2304 frequency ranges. The typical loss in the latter two bands is already quite significant, so directly connecting a low-noise amplifier to the feed source or, at the very least, on the tower is almost essential (especially for higher frequencies), while the below 50 MHz band does not require any consideration of this.
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