For each of the following case, select the type of NoSQL DBMS that would fit best the needs of the situation. a) The database has to support a relatively complex hierarchical internal record structure that may vary for each record. b) The key requirements for the database is to access a specific record structure as quickly as possible without any concern regarding the internal structure of the record. c) The data are particularly well suitable to be organized as a network of association between the data items. d) It is important that the DBMS provides quick access to each of the records by a key value, but, in addition, it has to also allow easy access to the components of each record.