In a parliamentary republic, a often serves as both head of state and head of government.
a.
prime minister
b.
king
c.
dictator
d.
monarch

In a parliamentary republic, a A. Prime Minister often serves as both head of state and head of government.

Explanation: The Prime Minister is the head of the state/cabinet and leads all of the ministers who serve on the executive branch of the government. A Prime Minister often works more closely and with the overall government of the country and not just the state level 

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.

answer; obscene;