challenge: What was the change made to the electoral system for the legislature prior to the 1978 Guamanian general election?
  
  A. The island was split into several districts, with members elected from each district
  B. Voters could only elect members from their district of residence
  C. The number of legislative members was reduced from 21 to 15
  D. The voting age was lowered from 21 to 18
  Answer: 