These steps are carried out to make solid magnesium sulfate. 1. measuring $20~\text{cm}^3$ of dilute sulfuric acid with a measuring cylinder 2. adding an excess of solid magnesium carbonate to dilute sulfuric acid 3. filtration 4. evaporation In which sequence should these steps be carried out?
- A$2 \rightarrow 4 \rightarrow 3 \rightarrow 1$
- B$2 \rightarrow 4 \rightarrow 1 \rightarrow 3$
- C$4 \rightarrow 2 \rightarrow 1 \rightarrow 3$
- D$4 \rightarrow 2 \rightarrow 3 \rightarrow 1$