Answer:
c. different character sets used for the names of people and places
Step-by-step explanation:
A global database is a common data base that can be access globally. But designing and implementing such data base is a problem because people from different parts of the world will have different names and for creating data base for all the people will be difficult because different character sets used for all these people.
Thus the answer is
c. different character sets used for the names of people and places