Which active form means “those women did not do”?

Negating the Imperfect with Lan and Lam: Subjunctive, Jussive and Full Paradigms

• لَمْ يَفْعَلْنَ
• لَنْ يَفْعَلْنَ
• لَمْ تَفْعَلْنَ
• لَمْ يَفْعَلُوا