Read this excerpt from "Famine Is a Feminist Issue: To Feed the World, Start by Teaching Girls to Read."

When women have access to education and are aware of family planning, birth rates decline. Author Gordon Conway explains the connections best in One Billion Hungry. He links equal rights for women to improvements in food production and consumption and future progress on food security. Of farmers worldwide, 43 percent are women. Because they are mothers, educators, and innovators, Conway argues, protecting women from discrimination and exploitation, and helping them to be more productive, will prevent widespread famine.

Which sentence from the paragraph uses a problem-solution structure?

"When women have access to education and are aware of family planning, birth rates decline."

"He links equal rights for women to improvements in food production and consumption..."

"...protecting women from discrimination and exploitation, and helping them to be more productive, will prevent widespread famine."

"Of farmers worldwide, 43 percent are women."