There was a time in America’s history when music was a centerpiece of family life. There were no televisions, radios, or other forms of electronic entertainment. Social life often involved someone playing the piano or another instrument while guests sang along or listened for enjoyment. Therefore, if parents could afford the opportunity, their children were encouraged to learn how to play an instrument. Taking music lessons did not mean a child was expected to become a professional musician. However, it usually meant the kids learned the daily discipline of practice. What is the central idea of Paragraph 2 in this passage?

Before technology, music provided entertainment and a social life for families.

By playing a musical instrument daily, children learned the discipline of practice.

TVs and radios have replaced playing a musical instrument as a source of entertainment.

Before technology, children were encouraged to learn to play a musical instrument.