Which challenge faced by many african nations was most influenced by a focus of cash crops

1) B. farming
2) A. high standard living AND C. modern technology
3) C. Nelson Mandela
4) A. environmental concerns 
5) A. food shortages
6) C. free speech
7) B. poor and sick people
8) A. foreign companies have moved many jobs to India.
9) B. closed down labor camps, D. let entrepreneurs set up businesses, AND E. permitted farmers to sell land
10) D. how to feed a rapidly growing population
11) D. a surge in missing persons
12) A. growth in shantytowns
13) D. socialist rebels in Nicaragua
14) D. strong military regimes
15) A. to promote economic cooperation in the Americas
16) C. and economic community
17) B. collapse of communism in Eastern Europe AND C. death of Josip Tito
18) C. increased unemployment
19) D. both nations splintered in part along ethnic lines
20) C. trade in energy resources