Which statement best describes the effect of poison gas attacks in World War 1?
A. They terrified soldiers and forced troops to carry gas masks,
B. They helped the Germans break through Allied lines at Verdun.
C. They were used to create major breakthroughs and ended the
system of trench warfare.
D. They were unsuccessful and did not alter the battlefield
experience for soldiers.

Study the graph and then complete the analysis of the data by filling in the missing information.

Which of the following episodes led to widespread charges that president reagan was not in adequate control? a. the u.s. retreat from lebanon after the bombing deaths of 241 u.s. marines as they lay sleeping in their barracks near beirut b. the trading of arms for hostages and the illegal funding of a right-wing insurgency in the iran-contra affair c. the sale of millions of acres of public lands to private corporations by the department of interior d. the proposal to congress, year after year, of federal budgets with huge deficits that ultimately ended up tripling the national debt

Which of these were achievements of the safavid dynasty? check all that apply.