What is a disadvantage of a handheld radio transceiver’s short flexible antenna compared to a full-sized quarter-wave antenna?

A handheld radio's short flexible antenna, commonly known as a 'rubber duck,' is physically shorter than a full-sized quarter-wave antenna. To compensate for this shortened length and achieve resonance, the antenna is wound into a tight coil, adding inductance. This physical compromise results in low electrical efficiency. A significant portion of the transmitter's power is lost as heat in the loading coil rather than being radiated into the air as a radio signal, making it perform worse than a full-size, uncoiled antenna. Other options are incorrect because an antenna is fundamentally a passive metal element; it does not care whether the signal is digital or analog. Furthermore, standard flexible antennas still transmit a linearly polarized signal, not a circularly polarized one.