The diagram illustrates the impact of a movement in the demand curve from $D_1$ to $D_2$ for a profit maximising firm. What change has occurred to the firm's total revenue and the deadweight welfare loss?
- Atotal revenue decreases to OGLQ; deadweight welfare loss decreases by KLN
- Btotal revenue decreases to OGLQ; deadweight welfare loss increases by KLN
- Ctotal revenue increases to OHKQ; deadweight welfare loss decreases by KLN
- Dtotal revenue increases to OHKQ; deadweight welfare loss increases by KLN