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OpenStudy (anonymous):
The Salk vaccine has proved to be a(n) ___ protection against the crippling disease of polio. A. artless B. excrescence C. efficacious D. crescendo i think its d
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OpenStudy (anonymous):
it's not d because crescendo has to do with music
OpenStudy (anonymous):
not medical subjects
OpenStudy (anonymous):
it looks like c
OpenStudy (vickyisthesmartone123):
yup it is c
OpenStudy (anonymous):
you should have some dictionary or something to help you find the definition of these words
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