Select from options: How similar are the following two sentences?

2 Americans Killed as Afghan Unrest Enters Fifth Day
Two American Officers Murdered As Afghan Unrest Continues

Give the answer on a scale from 0 - 5, where 0 is "not similar at all" and 5 is "means the same thing".


[a]. 0;
[b]. 1;
[c]. 2;
[d]. 3;
[e]. 4;
[f]. 5;
[e].