Hello,
The correct answer is C) Jonas Salk created a vaccine that has nearly eliminated the disease in the United States and many other developed countries.
Hope this helps!!!!
Theres nothing to solve? Post the question
<span>Cześć, dobrze, dobrze, jak się masz?
Robię dobrze.
Ale muszę iść do domu, do widzenia.
To jest tak ważne, potrzebuję go do jutra.</span>
Many have heard it, but nobody has ever seen it. It will not speak back until spoken to. What is it? The answer to the riddle is an echo. Echo is the reflection of the sound that when it is released by the speaker, it arrives back to the speaker (now listener) but is delayed.
