The correct options are
B A 9 PM news bulletin on Doordarshan.
D A publicly viewable blog currently followed by three individuals.
The word 'mass' in the term mass media refers to an aggregation or collection of people. The word 'media', on the other hand, essentially alludes to the various modes of communication. When a person communicates to or with the masses, she/he tends to utilise a platform such as television, radio, the newspapers, the internet, etc. Although public speaking is sometimes considered to be an example of mass communication, the scenario described here only refers to the individual practising it privately.