Answer:
Respected townsfolk, based on the details provided, it seems the most likely reason Saucedo overturned Edward's ruling in the alcalde election was Option D:
He declared that many of the new settlers were not eligible to vote.
Step-by-step explanation:
Overturning an election result requires a legitimate reason, such as determining that unlawful or ineligible votes were cast. Option D indicates Saucedo believed many of the new settlers who voted were not eligible to do so, calling the integrity of the election result into question. The other options do not provide sufficient justification for Saucedo to legally overturn the election result: Option A indicates Edwards' son-in-law was an eligible candidate, though perhaps favorably considered. Option B simply states Saucedo preferred a different candidate. Option C lacks specificity regarding what may have been "fixed" about the election. Only Option D, stating that many settlers were not eligible to vote, provides a plausible legal basis for Saucedo to overturn the election ruling in his role as alcalde. Without citizens' lawful right to vote being violated, the other reasons given would not justify such an action.