**Core Concept**
The question is testing the understanding of postpartum contraception options, particularly in a scenario with a recent vaginal delivery. The underlying principle involves choosing a contraceptive method that is safe, effective, and suitable for a woman who has just given birth.

**Why the Correct Answer is Right**
In a woman who has recently delivered vaginally, the most ideal method of contraception is the **Intrauterine Device (IUD)**, specifically the Copper T or Mirena IUD. This is because IUDs are highly effective, easy to use, and do not interfere with lactation or the postpartum recovery process. Additionally, IUDs can be inserted immediately after delivery, making them a convenient option for women seeking immediate contraception.

**Why Each Wrong Option is Incorrect**
* **Option A:** Oral Contraceptives may not be the best initial choice due to the risk of blood clots and other thromboembolic events in the postpartum period. Additionally, oral contraceptives may affect milk supply and are not as effective as IUDs in preventing pregnancy.
* **Option B:** Barrier methods, such as condoms, are not the most effective form of contraception and may not be suitable for immediate use postpartum.
* **Option C:** Sterilization is a permanent form of contraception and may not be suitable for women who wish to have future children.

**Clinical Pearl / High-Yield Fact**
IUDs are a safe and effective form of postpartum contraception, and their insertion can be performed in the hospital setting immediately after delivery, making them a convenient option for women seeking immediate contraception.

**Correct Answer:** C. Sterilization is not the best answer here as the question asks for a method that is 'ideal' and 'immediate'. However, given the options and the format, it seems the question is incomplete.