The main difference between these two public service ads is that the older ad provides specific ideas, while the newer ad tells how to get more information. The right answer is Option D.
Explanation:
Both the ads are on the topic "Not to waste food." The ad from 1917 gives this message with certain solutions. The pointers include - buying food using one's thought, cooking it with care, buying local foods, using leftover food among the others. Whereas, the modern ad starts by stating a fact about how much food is wasted in a year. A clip of the solution is given in the form of short phrases and the website is given in the end to redirect the person/s interest in knowing more about the issue and its solution.
