多选题Your boss at Certkiller .com wants you to clarify Oracle 10g. Which two steps are performed the first time any UPDATE statement is issued after the instance is started？（）ACreating the parse tree of the statementBWriting the modified data blocks to the 

Creating the parse tree of the statement

Writing the modified data blocks to the data files

Writing the modified data to the archived redo log files

Updating the control file to indicate the most recent checkpoint

Updating the data file header to indicate the most recent checkpoint

Reading the blocks to database buffer cache if they are not already there