/ NEED / DEVELOPING COUNTRIES/ RESEARCH / DO / AGRICULTURE PROBLEM...

48. / need / developing countries/ research / do / agriculture problems/ solutions / find//A. Developing countries need doing research to find solutions to agriculture problems.B. Developing countries need to do research to find solutions to agriculture problems.C. Developing countries need to do researching to find solutions to agriculture problems.D. Developing countries need doing research to finding solutions to agriculture problems.