Which respiratory muscle(s) function(s) only during forced expiration?

A) Diaphragm
B) External intercostals
C) Pectoralis major
D) Pectoralis minor
E) Internal intercostals

foraminiferans

A) excavates
B) stramenopiles
C) alveolates
D) rhizarians
E) archaeplastidae
F) amoebozoans
G) choanoflagellates