Which action did lonnie smith take to advance the cause of civil rights for african americans in texas?
a. he refused to take a seat in the backs of a city bus
b. he petitioned the governor for the right to attend university of texas
c. he published articles highlighting racism and the state government
d. he filed a lawsuit challenging the races primary system used by democrats

D. Lonnie Smith filed a challenging lawsuit to primary system of races used by democrats to advance the cause of civil rights for African Americans in Texas.

Lonnie Smith, a dentist by profession, was closely associated with the civil rights movement in Texas and was also a part of the National Association for the Advancement of Colored People. It was he who raised his voice against the all-white primaries in Texas and filed a lawsuit in the Supreme Court.

It was after the Supreme Court passed the judgment in the favor of Lonnie Smith the blacks got the right to vote in Texas.  

can you show the map

trade regulation is a field of law, often bracketed with antitrust (as in the phrase “antitrust and trade regulation law”), including government regulation of unfair methods of competition and unfair or deceptive business acts or practices. antitrust law is often considered a subset of trade regulation law. franchise and distribution law, consumer protection law, and advertising law are sometimes considered parts of trade regulation law.

in general the theory of economics says that the more open to trade a country is the better   the result for the same country and the whole economies.

in real life countries impose taxes, quotas, etc which is not so good for the economies.

this kind of commercial war between the usa and china is slowing down the growth of the whole world so we can say that it is a draw back of trade regulations. and the free trade agreements are benefits of trade regulations.