Which combination of measurements is accurate?
- Adiameter of capillary: $7\,\mu\text{m}$; diameter of red blood cell: $7\,\mu\text{m}$; thickness of cell surface membrane of red blood cell: $7\,\text{nm}$
- Bdiameter of capillary: $7\,\mu\text{m}$; diameter of red blood cell: $7\,\text{nm}$; thickness of cell surface membrane of red blood cell: $7\,\text{nm}$
- Cdiameter of capillary: $0.7\,\text{mm}$; diameter of red blood cell: $7\,\mu\text{m}$; thickness of cell surface membrane of red blood cell: $7\,\text{nm}$
- Ddiameter of capillary: $0.7\,\text{mm}$; diameter of red blood cell: $0.7\,\text{mm}$; thickness of cell surface membrane of red blood cell: $7\,\mu\text{m}$