400
After bundling up, Vicki struggled to pull on her boots.
"Need some help?" her mom asked as she looked at the school district's Web site.
"No thanks," Vicki said as she gazed out the window at the heavy snowfall.
"Honey, I know you worked hard to get dressed for school," Vicki's mom said, pointing to the computer screen. "But you can take everything off."
It is likely that:
a. The snow turned to rain.
b. Vicki's mom had to go to work.
c. School was canceled because of the weather.
What is c. School was canceled because of the weather?