(1) Michelle Obama was born on January 17, 1964, in Chicago, Illinois. (2) Her father, Fraser Robinson, was a city-pump operator and a Democratic captain of a subdivision of the city. (3) Her mother, Marian, left her job as a secretary to look after Michelle and her older brother, Craig. (4) Michelle's parents strongly believed in traditional family values and did all that they could for Michelle and Craig. (5) They spent time together and bonded over meals and family games. (6) Michelle's parents were very particular about their children's education. (7) Even before Michelle started going to school, she had learned to read. (8) She was so bright that she skipped second grade. (9) By the time she had passed her sixth grade exams, she had learned French and completed accelerated courses1 in biology. (10) Later, she attended Whitney M. Young Magnet High School, a school dedicated to children with a high learning capacity. (11) In 1981, Michelle graduated from the school with the second best grades in the class. (12) Michelle then attended Princeton University, graduating in 1985, with a B. A. in Sociology. (13) She then took admission in the prestigious Harvard Law School to study law. (14) When Barack Obama ran for reelection in 2012, Michelle traveled the country and gave speeches on his behalf. (15) After earning her Junior Doctorate from Harvard, Michelle worked at a law firm in Chicago. (16) Michelle and her daughters received public and media attention for their stylish clothes when they appeared for Barack Obama's inauguration ceremony in 2013. (17) Michelle married Barack Obama in 1992. Which sentence supports the main idea of the passage the least?
A. sentence 16
B. sentence 12
C. sentence 13
D. sentence 15