The correctly conjugated forms in the preterite tense are:
- "ella hizo" (she did/made) — the correct form of "hacer" for "ella" is "hizo."
- "nosotras hicimos" (we did/made) — this is correctly conjugated for "to do/make" in the first-person plural form.
The options "hicieronyo" and "hizo" are incorrect; "hicieron" would be the third-person plural of "hacer."
So, "nosotras hicimos" is the correct answer.