Please help!Giving 15 points<3

How has china attempted to increase its gdp since the end of the 20th

What was one step that charlemagne took to unite his kingdom? a. he chose a single strong heir to inherit his throne. b. he drove muslim forces out of europe. c. he created and supported schools. d. he declared himself head of the catholic church.

Recently, there has been pressure to loosen clean air standards. use economic arguments to support or oppose this proposed action.