Professional researchers work together with volunteers to identify and monitor the numbers and locations of these animals (43)___________ they can gain valuable knowledge of the ocean environ
Professional researchers work together with volunteers to identify and monitor the numbers and locations of these animals (43)___________ they can gain valuable knowledge of the ocean environment, the impact of climate change on the seas, the effects of chemical pollution, over-fishing and accidental capture in fishing gear.
A. in order to
B. because
C. so that
D. therefore