Select every form that can fill the gap in this past simple sentence: "The rain ____ the whole picnic on Saturday."

Explanation

This verb has two standard past simple forms. Spoilt is the more British spelling and spoiled the one preferred in American English, and each of them states the finished event on Saturday equally well. Spoiling is the -ing form and would need an auxiliary such as was in front of it, while spoilen does not exist in English at all.