**Core Concept**
Bilateral abductor paralysis of the larynx refers to the paralysis of both the posterior cricoarytenoid muscles, which are responsible for the abduction (opening) of the vocal folds. This condition leads to a characteristic voice change due to the altered vocal fold position and mobility.

**Why the Correct Answer is Right**
In bilateral abductor paralysis, the vocal folds are adducted (closed) due to the unopposed action of the interarytenoid muscle. The voice becomes breathy, weak, and often described as a "hot potato voice." This is because the vocal folds are stuck together, preventing the normal vibration and closure required for a normal voice. The posterior cricoarytenoid muscles are the only muscles responsible for vocal fold abduction, and their paralysis results in this characteristic voice change.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the voice change associated with bilateral abductor paralysis of the larynx.

**Option B:** This option is incorrect because it is more characteristic of a unilateral vocal cord paralysis, where the voice is often hoarse or weak on one side.

**Option C:** This option is incorrect because it describes a different condition, where the voice is high-pitched and squeaky due to a shortening of the vocal cord.

**Clinical Pearl / High-Yield Fact**
In bilateral abductor paralysis of the larynx, the voice is often described as "breathy" or "hot potato voice" due to the adducted vocal folds. This is an important clinical correlation that can help diagnose this condition.

**Correct Answer:** C. Breathless