Probably children between 7 and 9 years old because they have already learned how to read and write but they still have a limited vocabulary range comparing to older people. Also, they do not fully understand written instruction and recreate them in their own minds, the visual cues helpthe written language.
The answer is D. It helps you to understand that Anne's death was tragic, because she could not prevent others from publishing her diary.
Usually due to not paying workers enough, especially using workers in developing and poor countries which are desperate and will do work for very little. Big companies can sell cheap clothes but still make a huge profit from paying workers little.
