Which scenario would most likely cause a mass extinction?

a. global temperatures drop several degrees after several massive volcanic eruptions
b. a disease kills off a single species of predator within an ecosystem
c. a massive earthquake strikes north america
d. a wildfire burns a national park

(i think it would be b)

Producing disposable grocery bags consumes resources. recycling disposable bags is a solution that can recover some of the resources used to make new bags. which of the following behaviors could further refine the solution? a. disposing of bags by burning them b. reusing bags whenever possible c. using bags at once so that they do not break d. using only nonrenewable materials to make new bags subject is environmental science for apex users