What is a bilateral aid agency?
a. an agency that receives funding from two donors
b. an agency that focuses on two main health problems
c. development assistance agencies of high income countries
d. development assistance agencies of low income countries

i believe the answer is c

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.