Final answer:
Nelda can file as a head of household in 2017.
Step-by-step explanation:
The correct statement about Nelda's filing status in 2017 is b. Nelda can file as a head of household. To qualify for head of household status, Nelda must meet certain requirements. She must be unmarried or considered unmarried at the end of the year, have paid more than half the cost of keeping up her household, and have a qualifying dependent. Since Nelda is married but Chad abandoned her and she has two dependent children, she meets the criteria to file as head of household.