Answer:
When—and why—did the practice of foot binding begin? The first recorded binding occurred in the Five Dynasties and Ten States period in the 10th century. According to the story, an emperor had a favorite concubine, a dancer who built a gilded stage in the shape of a lotus flower.
Explanation:
Answer D
It's not answer A because its wording does not make sense. Along with that, It's not B or C because practicing new skills is only a part of why they made tools, and to learn a craft also doesn't make sense. So, it just made life easier to have tools.
The answer is a I hope this helps
The inherit flaws for polls
1st Heart Transplant = By Chris Barnard (12/03/1967)
Chicken Pox Vaccine = was Licence in 1995 ( but started tested in the 70s)
Microwave Ovens = By Percy Spencer in 1945
1st Computer = In 1975 (Got To love the 70s One of the Classic Years Of Music)
Barcodes= 1st Use was on Wrigley's Gum (My Favorite) in June 1974 (But the idea started from the Association Of American Railroads (Sponsored) in 1the very late 1960s
Lasers = By Theodore H. Maiman in the 1960's based on the work of two other fellow Scientists