Sentence number 3 and 4 provide and support generalizations made in the paragraph.
Answer: Option D.
Explanation:
Generalizations that have been made in the paragraph are about the artists such as the musicians, the writers and some other artists who are responsible for adding up creativity and productivity in our society and show casing their talent.
The generalizations made about them are that these people mostly do not work during the day and work at night. Some people sleep during the day time and some go to other jobs during the day. But mostly all the artists work at night only.