How did Muslim merchants influence how money was used during the Middle Ages? Traders required that customers use only Arabic coins.
Different regions adopted Arabic coins for doing business.
Arabic coins were used less because merchants preferred to barter
Traders from other cultures created coins to compete with Arabic coins.

Different regions adopted Arabic coins for doing business.

Explanation:

During the Middle Ages, the Islamic Empire was a strong economic center that had developed trade. Muslim merchants were traveling all over Africa, China, and Western Europe for trading, and their influence was therefore spread globally.

That is why the usage of Arabic coins – dinars – spread across different regions. It is suggested that it was a common currency in many places. Archaeologists have found many of Arbanic coins all over, some even thousands of miles away from the locations of the Islamic Empire.

1. Based on evidences most of  the descriptions he gave in his documents were inaccurate, there were discrepancies  in these;for example of the  rulers  accounts he gave before and after life time, and the geographical details he gave.

2.It was not possible for him to embark such a long  journey(73,000miles) at that time he quoted in his narration,due to the circumstances of the  events then; the means of transportation was  not fast then

3.Because many expedition had occurred  before his time,there was believe that his narration was based on compilation of contemporary travel reports (Plagiarism)of the period. E.g most of the pilgrimage  accounts he gave were word-for-word  of Ahmad  Ibn Jubayl.