Answer:
the answer is a predicate nominative
Because they hid the people and made sure they were the only ones who got to keep tabs
Synonyms: booklet, pamphlet, leaflet, flyer, handbill, catalog, handout, prospectus, fact sheet, folder
"college recruitment brochures"
The direct object recieves the action of the verb (ask who or what), so in #12 it would be teammate. In #13 ball receives the action.