The table illustrates the changes that happen in the thorax during breathing. Which changes happen during inspiration?
- Adiaphragm contracts; external intercostal muscles contract; internal intercostal muscles relax; pressure in thorax falls and then rises
- Bdiaphragm relaxes; external intercostal muscles relax; internal intercostal muscles contract; pressure in thorax rises and then falls
- Cdiaphragm relaxes; external intercostal muscles contract; internal intercostal muscles relax; pressure in thorax rises and then falls
- Ddiaphragm contracts; external intercostal muscles relax; internal intercostal muscles contract; pressure in thorax falls and then rises