By Ben Pickman The Wolverines are the highest-ranked school in their conference and one of five Big Ten schools in the top 25. Last week, Michigan reached its best-ever ranking in the women’s AP college basketball poll,climbing to No. 6 in the top 25. A week later, it has set another record. After wins over Indiana and Iowa, both of whom are ranked teams, the Wolverines climbed to No. 4 in this week’s poll. They also are the highest-ranking school in the Big Ten, which features five schools in the top 25. South Carolina (21–1) continued its streak atop the poll, collecting all 30 votes as the …