Which Command Chain Will Count the Number of Regular Files

Multiple Choice

Which command chain will count the number of regular files with the name of foo.txt within /home?

A) ls -lR /home | grep foo.txt | wc -l
B) find /home -type f -name foo.txt | wc -l
C) find /home -name foo.txt -count
D) find /home -name foo.txt | wc -l
E) grep -R foo.txt /home | wc -l