Which row identifies the blood vessel with the highest blood urea concentration and the blood vessel with the lowest blood urea concentration?
- Ahighest blood urea concentration: hepatic artery; lowest blood urea concentration: hepatic vein
- Bhighest blood urea concentration: hepatic vein; lowest blood urea concentration: renal vein
- Chighest blood urea concentration: hepatic portal vein; lowest blood urea concentration: renal artery
- Dhighest blood urea concentration: renal vein; lowest blood urea concentration: hepatic portal vein