Answer:
The effect of the verbal irony in the passage is that it suggests John Dashwood is not as nice as he appears. The passage states that Mr. John Dashwood promised to do everything in his power to make his sisters comfortable, which seems considerate and kind. However, the following sentence reveals that he may not be as pleasant as he seems, as it describes him as "rather cold-hearted and rather selfish." This contrast between his promise and his true nature creates verbal irony. It implies that John Dashwood may not genuinely care for his sisters' well-being and that his actions may be driven more by self-interest than by genuine concern.
Step-by-step explanation: