Final answer:
In medieval Europe, most heavy trade was carried out using gold and silver coins.
Step-by-step explanation:
In medieval Europe, most heavy trade was carried out using gold and silver coins. These precious metals became the preferred means of exchange because of their durability and portability. The first coins were minted in Lydia, now Turkey, around 650-600 B.C.E. Money took on a symbolic meaning and is still used in our modern-day cash, checks, and debit cards.