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English 13 Online
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

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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