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When a conflict arises in a major oil-exporting area of the world, such as the Middle East, the price of gasoline already in the storage tanks at local gas stations usually increases. Which of the following best explains this occurrence?
Menstrual Flow
The shedding of the uterine lining (endometrium) that occurs in the absence of pregnancy, resulting in bleeding through the vagina.
Estrogen
A group of steroid hormones that play an essential role in regulating female reproductive physiology, including the menstrual cycle and reproductive system development.
Progesterone
A hormone produced by the corpus luteum, known as a steroid, that encourages the uterus to get ready for pregnancy.
Umbilical Cord
A flexible cord-like structure containing blood vessels and attaching a mammal fetus to the placenta during gestation.
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