Mass and_ are the two things that affect the strength of the gravitational force
A force
B weight
C distance
D time

C, distance

Explanation:

Distance and mass are two major factors that affect the strength of the gravitational force.

economic impact of malaria is estimated to cost africa $12 billion every year. this figure factors in costs of health care, absenteeism, days lost in education, decreased productivity due to brain damage from cerebral malaria, and loss of investment and tourism.