Data collection about disagree to adolescent pregnancy. HELP ME GUY

According to official data of World Health Organization, every year, an estimated 21 million girls aged 15 to 19 years, and 2 million girls aged under 15 years become pregnant in developing regions. Approximately 16 million girls aged 15 to 19 years and 2.5 million girls under 16 years give birth each year in developing regions. Complications during pregnancy and childbirth are the leading cause of death for 15 to 19 year-old girls globally. Every year, some 3.9 million girls aged 15 to 19 years undergo unsafe abortions. Adolescent mothers (ages 10 to 19 years) face higher risks of eclampsia, puerperal endometritis, and systemic infections than women aged 20 to 24 years, and babies born to adolescent mothers face higher risks of low birth weight, preterm delivery, and severe neonatal conditions than those born to women aged 20 to 24 years.

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The answer is either 3 or 4