The equation represents a reaction in the gas phase. $\text{X(g)} \rightarrow \text{2Y(g)}$ The diagram presents the Boltzmann distribution for a fixed mass of $\text{X(g)}$ at temperature $T$ when no catalyst is present. The line $E_A$ shows the activation energy. Which diagrams correctly illustrate the effect of each of the following changes made separately and independently?
- A1, 2 and 3 are correct
- B1 and 2 only are correct
- C2 and 3 only are correct
- D1 only is correct