Indicate the mechanism of broncholytic effect of adrenaline:
A). Blockade of β-2-adrenoreceptors.
B). Stimulation of β-1-adrenoreceptors.
C). Stimulation β-2-adrenoreceptors.
D). Stimulation of α-1 and α-2-adrenoreceptors.
E). Blockade of N-cholinoreceptors.