Which item is an example of a primary source

How should i study korean, and how many hours should i study it? i am a high school student already learn japanese in class, also i play sports so i tend to not study korean much because i have an excuse, like, ‘i dont know how to properly study for korean’ 감사합니다

A30 year old man comes to the emergency room complaining of severe abdominal pain most of his body is covered with tattoos and he has several body piercings he informs the staff that he does not have health insurance

Choose the answer that best completes the sentence. at midnight, the little men came skipping in and were about to set to work on the leather; instead of the leather ready to cut out, they found the charming little clothes.