Problem: How does the sentence end?

Sam was not able to use the humidifier and instead used nasal spray to soothe his nose congestion, because the
Answer: humidifier was dirty.

Problem: How does the sentence end?

While Maria rode the bus to work, Megan rode a motorcycle because
Answer: Maria had an expired license.

Problem: How does the sentence end?

Elena always used paper bags but Patricia used plastic bags, because
Answer: Patricia was unconcerned about the environment.

Problem: How does the sentence end?

Christine was warmer than Rachel was because
Answer:
Christine was sitting closer to the fire outside.