The picnic had been scheduled for weeks in advance. The Morris family was looking forward to some fun and relaxation with friends. Mother Nature, however, didn't feel like cooperating with the family's plans. Dark clouds loomed on the horizon the entire morning. The family met some friends at the entrance to the park. While the kids started playing a game of catch, the adults worried about the possibility of rain. The sky began to darken and rumble as if a storm was about to break. Then, just as suddenly, the clouds parted and the sun shone through. Happy with this turn of events, the adults began setting up the picnic table and chairs.
Which event creates tension in the story?

A) Everyone arrived for the picnic.
B) The sky began to darken and rumble.
C) The sun shines through the clouds.
D) The kids start playing catch.