Final answer:
The currencies like German Mark and French Franc have been replaced by the Euro (€) for Eurozone countries, so Euro signs (€) should fill in the blanks.
Step-by-step explanation:
The question seems to be related to the currencies used in various countries. The currencies listed such as German Mark, French Franc, Italian Lira, and others, have all been replaced by the Euro (€) for the countries that are part of the Eurozone. Therefore, in a modern context, for the countries formerly using these currencies, the symbol to be filled in the blanks would most likely be option (b) Euro signs (€).