Final answer:
The lack of zero in Roman numerals was resolved with the adoption of the decimal positional number system, including the concept of zero, which was developed by Indian mathematicians during the Gupta period.
Step-by-step explanation:
The problem Roman numerals faced due to the lack of a zero was solved with the adoption of the decimal positional number system that includes the concept of zero, a mathematical achievement that stemmed from Indian mathematicians' work during the Gupta period. This number system, along with zero, was introduced to the European scholars through Greek and Islamic influences and allowed for more advanced mathematics, such as algebra. The accountants in European history greatly benefited from these developments as they allowed for more precise measurements, recordkeeping and sophisticated mathematical computations.