Which of the following sed commands will replace all instances of the string foo with the string foobar changing the file file1.txt in place?
A. sed ‘s/foo/foobar/g’ file1.txt
B. sed ‘s/foo/foobar/g’ file1.txt > file1.txt
C. sed ‘s/foo/foobar/g’ file1.txt | file1.txt
D. sed -i ‘s/foo/foobar/g’ file1.txt
E. sed -i ‘s/foo/foobar/g’ file1.txt > file1.txt