**Core Concept**
The question is about the lifespan of different types of Intrauterine Contraceptive Devices (IUCDs). IUCDs are a form of long-term reversible contraception that release hormones or have a physical mechanism to prevent fertilization. The lifespan of an IUCD is crucial for its effectiveness and the duration it remains in place.

**Why the Correct Answer is Right**
The Mirena IUCD is a type of levonorgestrel-releasing intrauterine system (LNG-IUS). It works by releasing a small amount of the hormone levonorgestrel, which thickens cervical mucus, thinning the uterine lining, and reducing menstrual bleeding. The Mirena IUCD has a lifespan of 5 years. However, it has a companion product, the Mirena 520, which has a lifespan of 6 years. There is another product, the Mirena 540, which has a lifespan of 7 years, and then there are the Mirena 530 and Mirena 580, which have a lifespan of 8 years, and then the Mirena 780 which has a lifespan of 10 years, and the Mirena 582 which also has a lifespan of 10 years.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not a type of IUCD or is not relevant to the lifespan of IUCDs.
**Option B:** This option is not a type of IUCD or is not relevant to the lifespan of IUCDs.
**Option C:** This option is not a type of IUCD or is not relevant to the lifespan of IUCDs.

**Clinical Pearl / High-Yield Fact**
It's essential to know the different types of IUCDs, their mechanisms of action, and their lifespans to provide appropriate contraceptive options for patients.

**Correct Answer:** C. Mirena 780 or D. Mirena 582. Both Mirena 780 and Mirena 582 have a lifespan of 10 years.