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

Malaysia detains Australian senator at airport
Malaysia detains Australian lawmaker at airport

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

Choose your answer from:
 (A). 0;
 (B). 1;
 (C). 2;
 (D). 3;
 (E). 4;
 (F). 5;
(E).