The medial and inferior portions of the external abdominal oblique muscle has a sheet-like tendon called an aponeurosis that allows it to be anchored to other structures. Medially, the aponeuroses of the left and right-side external abdominal oblique meets in the middle to form the linea alba; thus, the muscles anchors to its opposite counterpart. However, the inferior portions form a cord-like structure called the inguinal ligament. We see something similar with the internal abdominal oblique. Which of the following structures are formed from the inferior portion of the internal abdominal oblique?
A. Inguinal canal
B. Cremaster muscle (only in the male)
C. Rectus sheath
D. Pyramidalis