Which command will be used to match the pattern agarwal, Aggarwal, Agggarwal and agrawal in the file named empl.1st?

• A. grep “[aA]99*[ar][ra]wal” empl.1st
• B. grepag* empl.1st
• C. cutagrawal empl.1st
• D. grepag[ra][ar]wal empl.1st