How similar are these two sentences, on a scale from 0-5 (0 is "not similar" and 5 is "very similar")?

Bangladesh Honors Factory Victims
Retailers back Bangladesh factory safety pact

OPTIONS:
[A]. 0.
[B]. 1.
[C]. 2.
[D]. 3.
[E]. 4.
[F]. 5.
[D].