If the CACHE or NOCACHE options aren’t included in the CREATE SEQUENCE command, which of the following statements is correct? 

a. Oracle 11g generates 20 integers automatically and stores them in memory. 

b. No integers are cached by default. 

c. Only one integer is cached at a time. 

d. The command will fail. 

e. Oracle 11g generates 20 three-digit decimal numbers automatically and stores them in memory.