The answer is <span>early adopters. To complete the sentence:
</span>If the <span>early adopters </span>buying group is relatively small, the number of people who ultimately adopt the innovation likely will also be small.
I hope the answer will help.
An allegory is a poem , poems doesn't really reveal much so this could be considered as ( A form of concise simile)
I think D it’s the only one that makes sense