This is a test of commonsense with single/multi-choices. Complete the next sentence:

A man and a boy make a sand castle in the beach. people

Choose from: - walk and board along side water rivers.; - approach to watch the castle and start to make small house next the sand castle.; - are using child's sand castles in the sand.; - are pouring water on the shore.;
The answer is:
approach to watch the castle and start to make small house next the sand castle.