The peace agreement between the two rival countries seemed promising at first, but political analysts warned that it might only be a flash in the pan, without any long-term stability or commitment.What does the underlined idiom mean?

Explanation

The idiom 'flash in the pan' describes a situation that initially shows promise but ultimately fails to deliver any lasting impact or success. In the context of the peace agreement mentioned in the question, analysts suggest that while the agreement may have seemed hopeful at first, it lacks the necessary commitment and stability to be successful in the long term. The other options fail to capture this essence: B suggests a steady process, C implies danger rather than temporariness, and D introduces the concept of disaster, which is unrelated to the idiom's meaning.