Answer:
B. Plastics to make hard hats were not available in the 1930s, so workers either did not wear hats or wore hats made from cloth or felt.
Explanation:
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The correct version of these two sentences when combined is:
When we were in Europe on vacation, we usually flew on airplanes: however, sometimes we took the train.
We apply the semi-colon to indicate that they have different ideas, and that they are clauses being joined into one sentence.
Do you want to go to the ice cream shop?
We can ride our bicycles.
What is your favorite flavor?
My favorite flavor is chocolate.
How many scoops do you want?
The ice cream is very tasty.
The nonfiction text structure is the way a writer will organize nonfiction info from the text. The structure includes a table of contents, bolded words, headings, photographs, data charts, captions, charts, a glossary, and an index.