A. I think the ushers might question a grocery bag of candy under your sweater.
Explanation:
Remember that an understatement is a figure of speech that is used to make a situation seem less important than it really is. An event or thing is presented with less strenght than expected. It is very used in literature and on every day conversations, some of times with an ironic effect.
In this case the author of the sentence is being ironic as the ushers won't allow people to enter some things into the cinema. So by saying they "might question" the grocery bag he is impliying that they will be firm and won't allow the candies .
