Step 1: Analyse options.
- Aggravate: To make a problem worse.
- Alleviate: To make a problem or suffering less severe.
- Accelerate: To make something happen faster.
- In a formal context, a government typically takes steps to *improve* or *lessen* a bad situation.
Step 2: Conclusion.
"Alleviate" is the most appropriate and common word for improving a situation.
Final Answer: (b) alleviate.