Here's a problem to solve: The marsh willow herb is a plant native to the northeastern United States. It grows best in damp habitats. Which of the following environmental changes would most likely cause a decrease in the marsh willow herb population in an area?

Among the 4 following options, which is the correct answer?

- A: a rainstorm lasting several weeks
 
- B: a drought lasting twelve months
 
- C: unusually low temperatures during the month of July
 
- D: unusually high temperatures during the month of January
 