Prep语法题

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The hognose snake puts on an impressive bluff, hissing and rearing back, broadens the flesh
behind its head the way a cobra does, feigning repeated strikes, but, having no dangerous
fangs and no venom, eventually, if its pursuer is not cowed by the performance, will fall over and play dead.
(A) broadens the flesh behind its head the way a cobra does, feigning repeated strikes, but,
having no dangerous fangs and no venom,
(B) broadens the flesh behind its head the way a cobra does and feigns repeated strikes, but
with no dangerous fangs and no venom,
(C) broadening the flesh behind its head the way a cobra does and feigning repeated strikes,
but it has no dangerous fangs and no venom, and
(D) broadening the flesh behind its head the way a cobra does and feigns repeated strikes, but
with no dangerous fangs and no venom, and
(E) broadening the flesh behind its head the way a cobra does, feigning repeated strikes, but
with no dangerous fangs and no venom, and  
The ans is C, Can anyone help me to analyze it? Thank you.