Are usually aimed at the general population across the globe. some sources may have a very specific audience.

I believe the answer is:  disease-specific projects

disease-specific projects refers to a projects that being done to address a certain type of illness that popular in a certain region. These projects is usually rely on public funding. Which is why the project is aimed to the disease that threaten general population in order to obtain as much funding as possible.

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.