About the patterns to develop comparison and contrast paragraphs, which ones are correct? ( )

A．Subject-by-Subject pattern and Point-by-Point pattern are commonly used.
B．The subject-by-subject pattern focuses on each subject, one at a time.
C．“Subject” refers to the two items or people you will compare or contrast.
D．The subject-by-subject pattern provides a side-by-side analysis on each subject.