**Core Concept**
Dying deposition and dying declaration are two types of statements made by a person who is dying, typically in a medical or legal context. A dying deposition is a sworn testimony recorded before the person's death, while a dying declaration is an unsworn statement made by the person at the time of their death.

**Why the Correct Answer is Right**
A dying deposition is considered more important than a dying declaration because it is a sworn testimony, meaning it is made under oath. This makes it a more reliable and admissible form of evidence in court. In contrast, a dying declaration is an unsworn statement, and its reliability is often questioned due to the emotional state and potential bias of the person making the statement.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because a dying deposition is not considered more important than a dying declaration simply because it is written. Both forms of statements can be written or verbal.
**Option B:** This option is incorrect because a dying deposition is not considered more important than a dying declaration because it is recorded by a medical professional. While medical professionals may record dying depositions, the sworn nature of the testimony is what makes it more important.
**Option C:** This option is incorrect because a dying deposition is not considered more important than a dying declaration because it is used in civil cases. Both forms of statements can be used in both civil and criminal cases.

**Clinical Pearl / High-Yield Fact**
It's essential to note that both dying depositions and dying declarations can be admissible as evidence in court, but their reliability and weight depend on the specific circumstances of each case. A dying deposition is generally considered more reliable due to its sworn nature, but it's crucial to carefully evaluate each statement on a case-by-case basis.

**Correct Answer: C. Because it is sworn testimony.**