**Core Concept**
Hatter's shake is a condition associated with **mercury poisoning**, which affects the nervous system. It is characterized by tremors, particularly in the hands. This condition has been historically observed in hatters who used mercuric nitrate in the treatment and shaping of fur.

**Why the Correct Answer is Right**
The correct answer is related to the occupational exposure of hatters to mercury compounds. Mercury is a potent neurotoxin that can cause a range of symptoms, including tremors, neuropsychiatric symptoms, and kidney damage. The **mercuric ion** interferes with the normal functioning of the nervous system, leading to the characteristic tremors seen in Hatter's shake.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not relate to mercury exposure.
**Option B:** This option is also incorrect as it is not associated with the historical context of hatters and mercury poisoning.
**Option C:** Similarly, this option does not correspond with the known effects of mercury poisoning.
**Option D:** This is not the correct answer because Hatter's shake is specifically linked to mercury poisoning in the context of hat-making.

**Clinical Pearl / High-Yield Fact**
It's crucial to remember that **mercury poisoning** can present with a variety of symptoms, including tremors, mood changes, and dermatological manifestations. The history of occupational exposure is key to diagnosing such conditions.

**Correct Answer:** D. Mercury poisoning