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Unix Regular Expression - Quiz

Each question is worth one point. Select the best answer or answers for each question.
 
1. Which of the following two commands are using a regular expression?
Please select all the correct answers.
  A. ls *.jpg
  B. ls –l chap1 chap2 chap3
  C. grep hello letter
  D. grep "[Cc]hap*" myfile
  E. mv [Cc]hap* old_dir

2. Which two patterns will the regular expression [A-Z][a-z].* match?
Please select all the correct answers.
  A. 123Stop
  B. 123stop
  C. Stop123
  D. STOP123

3. Which of the following regular expressions must be quoted?
Please select all the correct answers.
  A. what
  B. what?
  C. what I want
  D. [Ww]hat