Critical Reasoning (CR) | Re: Often patients with ankle fractures that are stable, and thus do not

From the argument's context, we know that we are talking about ankle x rays (or at least x rays including ankle x rays)

Argument: When a number of follow-up x-rays were reviewed, however, all the fractures that had initially been judged stable were found to have healed correctly.

Before this, we talk about ankle fractures and the conclusion is based on this.

So when option (C) says "X-rays ... were reviewed", it does imply that we are talking about the x-rays reviewed above which are anklex-rays.