Which correction is needed for: The threat level at the compound has raised significantly since the protests began?

Which correction is needed for: The threat level at the compound has raised significantly since the protests began?

• A. Replace 'raised' with 'risen'
• B. Replace 'the protests' with 'protests'
• C. Remove 'significantly'
• D. Change 'has' to 'have'

Answer: (A)