A nurse is collecting data from the electronic health records (EHR) of a group of clients before their prenatal visits. Which of the following clients should the nurse identify as at risk for hypothyroidism?

The client who tested positive for a mutation of the GDF15 gene.

The client whose TSH levels are low and whose T4 levels are currently elevated.

The client who was diagnosed with Hashimoto's disease.

The client who tested positive for Helicobacter pylori infection.