It is answer C. They didn't understand the test and probably didn't know what they got wrong and couldn't study.
<u>The correct answer is A.</u> The diseases we immunize against are not gone and they are still deadly. These diseases still exist in many places in the world. Polio was eliminated from the United States thanks to vaccination, it still occurs in Afghanistan, Pakistan and Nigeria, being a serious problem there. If we do not get vaccinated this type of disease can return to the country.
I don't think there is a comma.....
Answer:
action or speech that makes someone annoyed or angry, especially deliberately: you should remain calm and not respond to provocation | he burst into tears at the slightest provocation.
• Law action or speech held to be likely to prompt physical retaliation: the assault had taken place under provocation
