Flood forecasts and warnings are issued by the:
Flood forecasts and warnings are issued by the:
The National Weather Service is responsible for issuing flood forecasts and warnings. It monitors weather patterns and provides information about potential and imminent flooding to help the public take necessary precautions. Other agencies, such as the Federal Emergency Management Agency or the Department of the Interior, may be involved in providing support and resources during flood events, but the primary responsibility for flood forecasting and warnings lies with the National Weather Service.
I think the answer is actually B...
In the United States, the National Weather Service issues flood watches and warnings for large-scale, gradual river flooding. Watches are issued when flooding is possible or expected within 12–48 hours, and warnings are issued when flooding over a large area or river flooding is imminent or occurring.
https://www.weather.gov/safety/flood-watch-warning