**Core Concept**
Menorrhagia refers to abnormally heavy or prolonged menstrual bleeding, which can be caused by various factors including hormonal imbalances, uterine fibroids, or coagulopathy. In this case, the patient's history of hypertension and menorrhagia suggests that her condition may be related to the anticoagulant effects of estrogen.

**Why the Correct Answer is Right**
The patient's history of hypertension and menorrhagia is suggestive of a condition known as Sheehan's syndrome or postpartum pituitary necrosis, which can be caused by severe postpartum hemorrhage leading to pituitary gland damage. However, this is less likely given the patient's age and parity. The most likely cause of her menorrhagia is the anticoagulant effects of estrogen, which can lead to increased menstrual bleeding. The best treatment for this patient would be to reduce estrogen levels, either by using a progesterone-only contraceptive method or by surgically removing the uterus (hysterectomy).

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not address the underlying cause of the patient's menorrhagia, which is likely related to the anticoagulant effects of estrogen.
**Option B:** This option is incorrect because it does not take into account the patient's history of hypertension, which may be exacerbated by estrogen use.
**Option C:** This option is incorrect because it does not consider the patient's desire for future fertility, which may be a concern with this treatment option.

**Clinical Pearl / High-Yield Fact**
In patients with menorrhagia, it is essential to consider the underlying cause of the bleeding and to use treatment options that address the underlying pathology. In this case, reducing estrogen levels is a key part of treatment.

**Correct Answer:** C. Mirena intrauterine system (IUS) for 3-6 months