A country had below $2.5$ deaths per $100\,000$ people from TB in one year, and in the following year this increased to $25$ deaths per $100\,000$. What could have led to this change? 1. reduced contact tracing 2. more refugee camps 3. sewage-contaminated water supply
- A1 and 2 only
- B1 and 3 only
- C2 and 3 only
- D1, 2 and 3