Which persuasive technique does this excerpt from a speech about climate change use?

Vanderbilt University’s Climate Change Research Network (CCRN) says people can do things as simple as turning off lights to help prevent global warming. The organization says that more people haven’t reacted to warnings about climate change because citizens are told they have to make huge sacrifices.

CCRN suggests that if each person does a lot of little things that add up, the climate change problem can still be solved. Driving and energy use take up one-third of the United States’ carbon dioxide emissions. That’s more than all the carbon emissions from industrial manufacturing.

CCRN's tips are simple: Take the bus or walk to work. Eat more fruits and vegetables instead of meat. Weatherize your home so you are not wasting energy while running the furnace and air conditioner. Turn off lights when you’re not using them. They say these small changes will help provide a habitable Earth for generations to come.

A.
personal stories
B.
expert opinion
C.
historical references
D.
emotional appeals