Final answer:
The percentage decline in Europe's population during the Black Death epidemic from 1300 to 1400 is estimated to be between 30% to 50%, with 35% being a suitable estimate within this range.
Step-by-step explanation:
The percentage decline in Europe's population during the Black Death epidemic from 1300 to 1400 was estimated to be between 30% to 50% of the population. Based on the given historical evidence, total mortality from the Black Death was typically within this range across affected regions of Europe. Considering the options provided: A) 25%, B) 15%, C) 35%, D) 10%, the best estimate that fits within the historical data would be option C) 35%, as this lies comfortably within the lower bound of the estimated range of 30% to 50%.