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(c) contains "shots that were sent by swift messenger", illogically implying that the shots themselves were sent by swift messenger.
yeah, but "news" is singular. (sorry, you just have to memorize that one.) so that modification doesn't work, because "were" is a plural verb.
(b) has "in order to", which is incorrect.
"IN ORDER TO" specifies the GOAL or PURPOSE of an action.

i took four days to finish the project -- correct
i took four days in order to finish the project -- incorrect
here, the second version is incorrect because “a finished project” is not a goal; it just describes what took four days.

i took four days off work in order to finish the project -- correct
in this case, my purpose in taking four days off work -- i.e., the goal that i hoped to achieve by doing so -- was to finish the project.