Read the passage. (1) Universal health care should be adopted by every country around the world. (2) Over 100 million people become poor every year because of healthcare bills. (3) Imagine how it feels to be afraid to go to the doctor for fear of plunging into debt. (4) That is a really terrible thing, and governments need to act. (5) The World Health Organization (WHO) says that universal health care is achievable, even in poor countries. (6) The WHO recommends spreading the costs of health care across the population, so no one is overly burdened. (7) If a responsible organization like the WHO says it is possible, then worldwide governments should implement universal healthcare immediately. Which revision is the best way to strengthen the argument? A sentence stating the claim should be added before sentence 1. Sentence 2 should be deleted because it does not clearly support the claim. Sentence 4 should be revised to incorporate strong supporting evidence. A sentence that includes a strong rebuttal should be added after sentence 7.

The revision that is the best way to strengthen the argument is:

Sentence 4 should be revised to incorporate strong supporting evidence.

Explanation:

In order to defend his claims, an author needs to offer his audience strong arguments. Strong arguments need support, which comes for providing evidence of what is being claimed. Having that in mind, let's take a look at sentence 4:

4) That is a really terrible thing, and governments need to act.

Even though sentence 4 is addressing what was said in sentence 3, it is still a weak sentence to be included. It does not support the argument with evidence at all. It simply conveys the author's personal opinion and feelings, which is not enough to help strengthen this argument. The best way to revise it would be by adding evidence that truly conveys the idea that not having healthcare is a terrible thing.

c

Explanation:

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).