Question: Which of the following characterizes breast ductal carcinoma in situ? Need Assignment Help? Option A It is considered a cancer precursor and malignant cells have invaded the stroma Option B Malignant cells have invaded the stroma and it has a lower risk for invasive cancer compared to lobular carcinoma in situ Option C Malignant cells have not invaded the stroma and is considered a cancer precursor. Option D It is less common than lobular carcinoma in situ and less invasive compared to lobular carcinoma in situ