D) Tilden, the candidate supported by much of the South, won the popular vote.
Many Southerners were angered by the decision to award the 1876 election to Rutherford B. Hayes because Samuel J. Tilden, the Democratic candidate, won the popular vote. However, due to the disputed electoral votes in several states, Hayes was ultimately awarded the presidency through a controversial compromise, which many in the South viewed as a betrayal of their support for Tilden. This perceived injustice contributed to the ongoing resentment in the Southern states.