The best option is B, A neighbourhood there had been built over a toxic dump.
Step-by-step explanation:
Due to the heavy rainstorms and seeping of chemical wastes, there was declared an emergency on public health in 1978. The principle purpose behind this worry is on account of there are a considerable measure of dangerous squandered covered underneath the dirt of the Niagara Falls' Love Canal. The compound organization presently known as Occidental Petroleum covered 22,000 tons of dangerous waste nearby had.