Tom wants a candy bar and is trying to decide between a crunch, a snickers, or a mily way. these three candy bars are in tom' .

evoked set

Explanation:

Evoked set

The group or the collection of the possible brand of items , the consumer or the buyer is narrowing down , out of all the other products , These selected brands or items are characteristic as the Evoked set .

These brand could be the well trusted or most familiar brands and which immediately comes on the mind of the customer .

Hence , in this case , Tom is short listing from a selected brands to decide his candy bar .