Which of the following eventually resulted in niagara falls’ love canal neighborhood being declared a federal emergency in 1978? a. oil drilling in the area had destroyed its ecosystem. b. a neighborhood there had been built over a toxic dump. c. a large amount of iron, zinc, and lead mining had poisoned the water supply. d. there had been an accident at a nearby nuclear power plant.

Select the correct answer.look at this nineteenth-century illustration of london. which explanation best relates this illustration to changes in britain in the 1800s? a.factory workers in cities lost their livelihood because of the lack of housingb.industrialization narrowed the inccome gap between landowners and workers.c.the migration of workers from rural to urban areas resulted in overcrowded citiesd.the spread of railways allowed farmers to sell produce far from where it was grown.