Answer:
comparison/contrast
Step-by-step explanation:
The most effective organizational strategy for Antonia's presentation would be by comparison/contrast. This organizational strategy focuses on comparing all the pros and cons of choosing to go a certain route in a business decision with the pros and cons of choosing to go another route. This is what Antonia is planning to discuss with the advantages and disadvantages, but in order to convince the viewers she needs to compare this with the advantages and disadvantages of not selling exclusively online.