Which multimedia choice would be most effective in persuading blog readers not to eat fast food?

a video clip featuring the unhealthy ingredients in fast food
an interview with the founder of a popular fast food restaurant
a clip from a scientific lecture on the chemistry of food engineering
a public service announcement teaching children nutrition facts

A video clip featuring the unhealthy ingredients in fast food would be the most persuasive choice.

The interview with the founder would be biased towards the fast food restaurant. The clip from the scientific lecture wouldn't persuade readers not to eat unhealthy food, it would just teach them about food engineering. The PSA would also be ineffective at persuading readers not to eat unhealthy food, it would just teach them nutrition facts. 

The first option is the best because it is the only one that is directly warning readers away from the fast food.