Answer:
A & B.
Step-by-step explanation:
Digital marketing is a marketing strategy that uses the internet to digitally market goods and services of producer through display advertising and other medium.
It makes use of search engine optimisation (SEO), search engine marketing, content marketing, content automation, data-driven marketing, e-commerce marketing etc.
It takes advantage of all available medium to advertise product. Two efficient way of gain viewer's attention is through online video streaming and image display on the internet and social media platform.