Which situation most likely developed as a result of gerrymandering?
A. Nearly all of a state's congressional districts include small Democratic populations and large Republican populations.
B. A state receives complaints from its citizens that voting machines in several districts are extremely out of date.
C. Most of a state's political contributions come from donors in a single, wealthy congressional district.
D. A state loses one of its congressional representatives during reapportionment and must redistrict.