According to Eric Schlosser, California had given birth to an "entirely new lifestyle." Explain in detail the characteristics of this new life style and the culture that went along with it.

  i think it is   b because it to subject

Adjective clauses  begin with words such as that, when, where, who, whom, whose, which, and why. an essential (or restrictive)  adjective clauseprovides information that is necessary for identifying the word it modifies. so for example*** wrong= i the man gave me direction. example right ( i the man who gave me the  direction.