Extra exam question E1A01

WhyA 3 kHz wide USB signal carried at 14.348 MHz occupies roughly 14.348 to 14.351 MHz, and the upper 1 kHz of that falls outside the 20 meter band, which ends at 14.350 MHz. A USB signal's energy sits above its carrier frequency, so a 3 kHz wide USB signal carried at 14.348 MHz occupies roughly 14.348 to 14.351 MHz. The 20-meter band ends at 14.350 MHz, so the top 1 kHz of that occupied bandwidth falls outside the band, answer D. The carrier itself is inside the band and USB is perfectly legal on 20-meter phone, so A and C are wrong, and the problem is the upper edge of the signal, not the lower.