A.
Diaphragm relaxes, external intercostals contract, pleural pressure increases
B.
Diaphragm relaxes, pleural pressure decreases, internal intercostals relax
C.
Diaphragm and external intercostals contract, pleural and alveolar pressures decrease
D.
External and internal intercostals contract, pleural and alveolar pressure increase
E.
Diaphragm contracts, pleural pressure increases, alveolar pressure decreases