Following an Incident in Which a City's Water Supply Was

Following an incident in which a city's water supply was contaminated by a chemical spill,researchers carefully read online comments posted in response to news stories to gauge the public mood.They specifically look for ideas related to trust in the water company,the company responsible for the spill,and the responsible government agencies,as well as for indicators of financial stress,emotional stress,and health issues associated with the contamination.The researchers are best described as using ____.

A) thematic analysis
B) focus measures
C) self-report
D) subjective measurement