The context says every technician performs the inspection. Which sentence makes the plural technicians the antecedent in the one-of relative construction?

Explanation

Asha is one of the technicians who inspect every alarm uses plural inspect because who refers to the technicians as a group. Inspects is a standard alternative when the relative clause attaches to the whole phrase headed by one, but it conflicts with this stated group reading; are also breaks agreement with Asha.