**Core Concept**
The question tests knowledge of tick-borne illnesses and their vectors, specifically focusing on the role of soft ticks. Soft ticks, also known as argasid ticks, are known to transmit several diseases.

**Why the Correct Answer is Right**
Since the correct answer is not provided, let's discuss the general principle: diseases like Relapsing Fever are transmitted by soft ticks. The transmission dynamics involve the tick's saliva and the bacteria it may carry, such as *Borrelia* species.

**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific disease, it's hard to comment, but typically, diseases not transmitted by soft ticks would be those transmitted by hard ticks or other vectors.
**Option B:** Similarly, without specifics, we can't determine why it's incorrect, but if it's a disease known to be transmitted by soft ticks, it wouldn't be the correct answer.
**Option C:** Again, lacking specifics, but if a disease is known to be soft tick-borne, it's not the answer.
**Option D:** This would be incorrect if it's a disease transmitted by soft ticks.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that soft ticks are primarily associated with transmitting Relapsing Fever, which is caused by *Borrelia* species.

**Correct Answer:** Not provided in the query.