You may say either; in both cases the events are simultaneous.
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Reegisthe word 'as'There's your answer.
Reegis3a - consecutive 3b - parallel 3c - parallelRight. (I would say 'simultaneous', not 'parallel'.)
ReegisWould you normally choose 3b or 3c?Probably 3b. Besides, 3c only works well for two things at the same time.