Which of the following is NOT a reason why class is important, according to global identity theorist

Which of the following is NOT a reason why class is important, according to global identity theorists?
a. Lower classes tend to fragment along ethnic lines and compete against each other.
b. The power of states to “manufacture consent” declines as economic and political elites operate according to increasing transnational interests.
c. Immigrants tend to remain closely linked to their home countries.
d. In global popular culture, the world’s middle classes tend to eat food from the same restaurants, watch the same movies, and buy the same books and other consumer goods.