"Ich ochrona była wtedy słabsza."

Translation: Their security was weaker back then.

[reznuk]

I answered "their security then was weaker", which is fine in English (although less colloquial than "their security was weaker then"), but it's still correct, and was rejected .

[Arnoldpitt]

I thought it should ochrona but sounded clearly like okrona

[Jellei]

I think it sounds fine to me...