Q--Would a fungal life-form be threatened by a pigment from copper?
A--My step-by-step reasoning: Verdigris is a pigment made from copper. Verdigris is also used as a fungicide.
So, the answer is yes.

Q--Was being a mail carrier considered one of the most dangerous jobs?
A--My step-by-step reasoning: The Pony Express was one of the first mail carrier services. The Pony Express operated form 1860 to 1861. Pony Express riders would have to travel hundreds of miles on horse back through extreme weather and terrain. The Pony Express sought to hire young expert horse riders willing to risk death.
So, the answer is yes.

Q--Did the 40th president of the United States forward lolcats to his friends?
A--My step-by-step reasoning: The 40th president of the United States was Ronald Reagan. Ronald Reagan died in 2004. The first recorded use of the term lolcat occurred in 2006.
So, the answer is no.

Q--Would a diet of ice eventually kill a person?
A--
My step-by-step reasoning: Humans can survive without water for four days. Ice can be melted into water, which consists of hydrogen and oxygen, using a simple cigarette lighter. Humans can survive without food for 30 to 40 days on average. Humans need carbohydrates, proteins, and fats that are contained in foods. Water does not contain fat, carbohydrates or protein.
So, the answer is yes.