In industry, the Haber process is used to produce ammonia from hydrogen and nitrogen. $3\text{H}_2 + \text{N}_2 \rightleftharpoons 2\text{NH}_3$ Which statements about the activation energy for this process are correct?
- A1, 2 and 3
- B1 and 2 only
- C2 and 3 only
- D1 only