Explanation: A wavelength is fundamentally defined as the distance a wave will travel in the time it takes for one complete cycle. This is represented by the formula λ = v * T, where λ is wavelength, v is the wave's speed, and T is the period (time for one cycle). Thus, statement A is correct. For radio waves in free space, the speed (v) is the speed of light (c), approximately 300,000,000 meters per second. The formula relating wavelength (λ) to frequency (f) is λ = c / f. When calculating wavelength in centimeters (cm) and frequency in megahertz (MHz), the formula simplifies to λ (cm) = 30,000 / f (MHz). This is a standard calculation used in amateur radio, making statement B also correct. Since both descriptions A and B are accurate, the correct answer is C.