I believe the answer is A because it includes all neccessary details for something that is paraphrased.
(it's correct I just took the test:)
In the Metamorphosis, Kafka makes it evident that Gregor endures a hellish existence as a bug. He works hard all the time, doesn't really have any kind of life, besides providing for his family and being very depressed, so when he is turned into a cockroach, his whole life turns upside down.
The correct answer is 4. It supports the overall organization of the speech by building an argument for a particular solution.
Explanation
The text presents a proposal to unify the celebration of junior and senior promotion. In this text, the author compares and contrasts both celebrations, indeed, the author exposes the minimum differences between both celebrations, for example in the junior the attire is semi-formal and the attendees are junior, while in the senior, the attire is formal and the attendees are senior. Moreover, the author explains the characteristics of both celebrations are very similar. From the differences and similarities an argument is built in which it is exposed why it would be better to unify them to reduce the costs of implementation and allow more people to attend it by reducing the income value. According to the above, the correct answer is 4. It supports the overall organization of speech by building an argument for a particular solution.