Find the mistake: That pottery was found by an archaeologist while she was worked in this area.

Knowledge: Past continuous, past simple

Explain:

The past continuous is used to emphasize that an event was happening at a certain time in the past (past continuous), when another action was interrupted (past simple).

Formula for the past continuous: S + was/were + Ving.

Simple past tense formula: S + Ved.

Edit: was worked => was working

That pottery was found by an archaeologist while she was working in the area.

Choose D.