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