Effective headlines for social media messages are

A) clever and witty.
B) pithy and enigmatic.
C) brainteasers with a twist of irony.
D) concise,specific,and informative.

Effective headlines for social media messages should be concise, specific, and informative. This will help the audience quickly understand what the message is about and increase the chances of them engaging with the content. Clever and witty headlines, as well as brainteasers or enigmatic messages, may be attention-grabbing but can also confuse the audience or turn them off.