Their, since the sentence is refering to two people.
You forgot to put the paragraph.
Answer:
To write their letters home, soldiers purchased paper, envelopes, ink and pens from sutlers. Stationary makers printed many styles of patriotic stationary and envelopes with engravings of camp scenes or political humor and these were quite popular among soldiers.
A. Pause briefly after colons, semicolons, and periods.
<span>c. Read capitalized words in a more pronounced manner.
</span><span>d. Continue reading if a line doesn’t end with punctuation.
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