Knowledge Graphs Exercise 2.7 - Relational Data Model vs Graph Data Models Which of the following statements is true regarding a relational data model and a graph data model? (a) A relational database system can be used as a storage mechanism for a graph database. yes no (b) It is easier to change the schema in a graph database than in a relational database. yes no (c) Queries always run faster in a graph database. yes no (d) A graph database is an ideal choice for storing timeseries data. yes no (e) Relational data model has a definite advantage if we need to capture relations of arity higher than 2. yes no