Final answer:
A multiple conversion superheterodyne receiver is more at risk for spurious responses than a single-conversion receiver due to greater frequency stability, which introduces more opportunities for unwanted signals during multiple conversion stages.
Step-by-step explanation:
A multiple conversion superheterodyne receiver is more susceptible to spurious responses than a single-conversion receiver because of greater frequency stability. This increased susceptibility is not due to increased selectivity, higher image frequency, or lower sensitivity. In a multiple conversion receiver, there are multiple stages in which the signal is converted to various intermediate frequencies. Each stage of frequency conversion introduces the possibility of additional spurious signals, which can occur if unwanted signals mix with the local oscillators used in these stages. As a result, the likelihood of these unwanted spurious responses is higher than in a single-conversion receiver that only undergoes one stage of frequency conversion.