A 40-Year-Old Woman Had Delivered a 4

A 40-year-old woman had delivered a 4.5 kg baby in the last week. The patient is a known case of gestational diabetes mellitus and inherited bleeding disorder. Her BMI is 40 kg/m2. The patient presented to the emergency department with a left calf swelling. Temperature is 36.7 C (98 F) , blood pressure is 120/80mm Hg, the pulse is 100/min, and respirations are 15/min. Doppler ultrasonography revealed a left deep venous thrombosis. A filter placement is planned to prevent embolization. A section of the patient's abdominal CT at the level of L2 is shown in the image below. The filter will most likely be placed in which of the following structures?

A) A
B) B
C) C
D) D
E) E