Answer: A. Special event
Step-by-step explanation:
Special events are occasions where the customers and the company get to meet face to face and talk about products and services on offer. Special events are very ideal for product launches, or trade shows where the company aims to sell more of what it has.
Isaac Mizrahi most probably just launched the new book and so this special event is a way of marketing it to the public through face-to-face contact.