write my assignment 1706

According to David Lewis which of the following is correct? (A) External time corresponds to the temporal ordering of events and personal time always corresponds to the causal ordering of events for the time-traveller. (B) External time always corresponds to the causal ordering of events for the time-traveller and personal time corresponds to the temporal ordering of events. (C) External time corresponds to personal time and the temporal ordering of events always corresponds to the causal ordering of events for the time-traveller. (D) External ordering of events corresponds to temporal time and the personal ordering of events always corresponds to causal time.