What evidence does Obama mostly rely on in this excerpt?
Read the passage from President Barack Obama's
address on Syria
On August 21st, these basic rules were violated, along
with our sense of common humanity. No one disputes
that chemical weapons were used in Syria. The world
saw thousands of videos, cell phone pictures, and
social media accounts from the attack, and
humanitanan organizations told stories of hospitals
packed with people who had symptoms of poison gas.
O experiments and expert opinions
O analogies and testimonials
O visual evidence and anecdotes
personal observations and facts