A male jackdaw's courtship behaviour ios astonishingly human. All his movements are consciously strained and his proudly reared head and neck are permanently in a state of self-display. He provokes the other jackdaws continually if the female jacdaw is looking on and he purposefully becomes embroiled in conflicts with otherwise deeply respected superiors. About all, he seeks to impress his loved one with the possession of a potential nesting site, from which he derives all other jackdaws, irrespective of their rank.
Which of the phrases best helps to bring out the precise meaning of 'consciously strained' ?

Options

A. Proudly reared and exhibited
B. Permanently in a state of display
C. Purposefully put in a state of display
D. Possession of nesting sight