The Gobi Desert is surrounded by mountains on one side and China on its southern border Hope this has helped :)
The negatives include accelerating population ageing, the skewed sex ratio, and the decline in the working-age population, which would threaten economic growth. Moreover, in 1980 the government had pledged that the one-child policy would last for just one generation, so change was overdue.
The answwer is b but not exactly