Which of the following was an effective weapon in wwi because the vapors given off caused burning, swelling of nose, throat, and eyes, and often death?

richard milhous nixon (january 9, 1913 – april 22, 1994) was the 37th president of the united states, serving from 1969 to 1974, when he became the only president to resign (quit). he is also known for corruption and the watergate scandal which resulted in the public losing trust in him and his resignation.