When Sheila is in Country A, she is considered to be black, but when she travels to Country B, she is considered to be white. Given what you know about the social construction of race, which of the following best explains this situation?
a. Sheila sometimes says that she is black and sometimes says that she is white.
b. Sheila's race varies because each country has defined race according to different criteria.
c. Sheila's gender makes it possible for others to interpret her race in different ways.
d. In one country ethnicity matters more than race, and in the other the opposite is true.