Identify the examples of diffusion in the list below. check all that apply
a) a teacher takes the cap off a permanent marker. a few minutes later, students at the back of the classroom complain about the odor of the marker
b) a cooking school students burns a piece of toast. soon, the entire kitchen smells like burnt toast
c) an inflated balloon shrinks when it is placed in a cold freezer
d) toxic fumes produced by chemical factory are detected in the air in a town several miles away
e) heating a flexible container filled with gas causes it to expand