Answer:
There is alredy a treaty called Geneva Gas Protocol that banned the use of these weapons
The Geneva Gas Protocol, in full Protocol for the Prohibition of the Use in War of Asphyxiating, Poisonous or Other Gases, and of Bacteriological Methods of Warfare, in international law, treaty signed in 1925 by most of the world’s countries banning the use of chemical and biological weapons in warfare. It was drafted at the 1925 Geneva Conference as part of a series of measures designed to avoid repetition of the atrocities committed by the belligerents in World War I.
The problem is that it is difficult to implement but a good measure would be very high fines to the countries that produce or stockpile these weapons.
C) Texas sought to gain independence from Mexico, due to Mexico's government changing from a democracy to a dictatorship.
Texas saw the laws in Mexico as arbitrary and tyrannic in many ways. It reminded them of how British used to treat the colonies, maybe worse. They did not want to follow the rules of Mexico.
That Americans shouldn't just assume their safe from the attack and be prepared for war also.
