In the story, pet owners are too scared of the crocodile to bring their sick pets to Doctor Dolittle. When Sweett's read this, he made the inference that Dr. Dolittle was losing money because of the crocodile. What background knowledge BEST supports Sweett's inference?

Animal doctors get paid by the pet owners

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the service industry in the united states grew in the late 1800s. what was one effect of that growth?

the number of people with jobs in factories as unskilled workers decreased.

the number of people with jobs in factories as unskilled workers increased.

the middle class grew as people took jobs as clerks, lawyers, and teachers.

the middle class shrank as people left jobs as clerks, lawyers, and teachers.