Answer:
C. “We will examine how a strike led to the eventual formation of a farm workers union"
Explanation:
The cause in this answer is the "Strike" and the effect is "formation of a farmers union"
EDGE2020
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The one that has the correct punctuation is the second option : "More and more teenagers are being diagnosed with type Ii diabetes" said Mrs. Allen, our school nurse
After quotation mark, you shouldn't use capital letter and you shouldn't use comma before the second quote
hope this helps