Answer:
C. Place advertisements on social media
Step-by-step explanation:
The promotional strategy that would be best suited for a new cell phone with advanced features is advertisment on social media because it is meant for targeted audience.
Although radio advertisement covers a wider range of audience, social media advertisement will be the best for the above scenario because it covers targeted audience and also perspective buyers would like to see sample of those features which will not be possible in radio advertisement.
There are various social media platforms like Instagrams, linkedln etc where these products can be advertised and the advanced features seen by targeted audience before placing an order.