A)which caused the heads of the sprinkler system to burst, which released torrents of water --> which cannot be used as it is modifying a verb where as it should modify a noun or a pronoun.
B)which caused the heads of the sprinkler system to burst andwhich released torrents of water --> first which has same error as in A, second which is redundant.
C)which caused the heads of the sprinkler system to burst, torrents of water were then released --> first which has same error as in A
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B)which caused the heads of the sprinkler system to burst andwhich released torrents of water --> first which has same error as in A, second which is redundant.
C)which caused the heads of the sprinkler system to burst, torrents of water were then released --> first which has same error as in A
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