GMAT Sentence Correction (SC) | The hognose snake puts on an impressive bluff, hissing and

Sentence structure
noun verb
The hognosesnake puts on an impressive bluff,

hissing and rearing back,
broadens [1] the flesh behind its head the way a cobra does [2],
feigning repeated strikes,

but [3] having[4] no dangerous fangs and no venom, [5]
eventually, if its pursueris not cowered by the performance,will fall over andplay dead.

[1] broadens should be in parallel with hissing and feigning. Note: hissing is in the non-underlinedportion
[2] parallel elements in a list should be connected properly
...

---