Indoor Plumbing.
Primarily, it has provided a greater level of sanitation in modern life. The use of running water to wash your hands and bathe reduces the likelihood of spreading germs and bacteria. The ability to cleanly remove waste away from heavily populated areas allows for cleaner air, thus, fewer respiratory related illnesses. Ultimately, it has propelled civilizations towards the better quality of life that we enjoy today.
The answer is probably 200-250words and no more.
I know this because i saw a lot of questions asked me to do documented summary with 200-250words last year.
Hope this one is correct.
The answer is D. In the event of him resigning his job, his family would starve.
