The correct answer is B. Italy.
Lucas Pacioli was an Italian Franciscan friar, mathematician, and accountant. He is considered the father of accounting because he was the first to write a comprehensive treatise on double-entry bookkeeping, Summa de arithmetica, geometria, proportioni et proportionalita, published in 1494.
Option A is incorrect because America was not yet discovered in the 15th century.
Option C is incorrect because India did not have a significant influence on the development of double-entry bookkeeping.
Option D is incorrect because Japan was not yet a major economic power in the 15th century.