Correct Answer: A
Schema builder is a dynamic way for observing and modifying all objects and relationships in salesforce. It can be used to create all types of custom fields except for geolocation.
Option B is incorrect because schema builder allows you to create custom objects
Option C is incorrect because schema builder allows you to create master-detail relationship
Option D is incorrect because schema builder allows you to create lookup relationship
https://help.salesforce.com/articleView?id=schema_builder.htm&type=5