**Core Concept**
The question requires knowledge of zoonotic diseases, specifically those transmitted through rodents, such as rats. Leptospirosis is a bacterial infection caused by the Leptospira genus, which is commonly found in rats and other rodents.

**Why the Correct Answer is Right**
Leptospirosis is transmitted to humans through contact with water, food, or soil contaminated with the urine of infected rats. The bacteria enter the human body through cuts or abrasions on the skin or through mucous membranes. Once inside, the bacteria can cause a range of symptoms, from mild to severe, including fever, headache, and muscle aches. In severe cases, leptospirosis can lead to kidney and liver failure, and even death. The transmission of leptospirosis through rats is a significant public health concern, particularly in areas with poor sanitation and hygiene.

**Why Each Wrong Option is Incorrect**
**Option A:** Hantavirus is a viral disease transmitted through rodents, such as rats, but it is primarily found in the Americas and is not as widespread as leptospirosis.
**Option B:** Plague is a bacterial disease transmitted through fleas that live on rodents, but it is not transmitted directly through contact with rats.
**Option C:** Lymphocytic choriomeningitis (LCM) is a viral disease transmitted through rodents, such as rats, but it is not as commonly associated with rat transmission as leptospirosis.

**Clinical Pearl / High-Yield Fact**
Rats can carry a range of infectious diseases, including leptospirosis, hantavirus, and LCM, highlighting the importance of proper sanitation and hygiene in areas where rodents are present.

**Correct Answer:** C.