Final answer:
The woman is in a high-risk pregnancy category due to her family history of diabetes and cancer, low BMI, and history of drug and alcohol use, which all contribute to potential complications.
Step-by-step explanation:
The characteristics that place the woman in a high risk category for complications during pregnancy are her family history of diabetes mellitus and cancer, her low body mass index (BMI) of 17.5, and her drug/alcohol use. The family history of diabetes can increase the risk of gestational diabetes. A low BMI may be associated with nutritional deficiencies that could affect pregnancy. The use of cocaine and alcohol is highly concerning due to their potential to cause serious developmental problems in the fetus, including an increased risk for neural tube defects (NTDs), which is especially relevant given her sister's experience with an infant born with an NTD. Therefore, the correct answer to this question would be 'd. Family history, BMI, drug/alcohol abuse.'