Final answer:
The phrase 'to say or utter' from the provided options refers to b) OMG, which is frequently used by teens in speech and text as an expression of emotion.
Step-by-step explanation:
The phrase "to say or utter" refers to the act of expressing or vocalizing words. When considering the options provided: a) ID, b) OMG, c) BTW, d) PS - the answer is b) OMG. This informal expression stands for "Oh my God" and is frequently used by teens and in texting as an exclamation of surprise, excitement, or disbelief. This is a reflection of how language evolves with culture and technology. Just as new terms like e-mail, Internet, and texting were quickly adopted into our vocabulary, so too have expressions like OMG become commonplace.