Final answer:
The 15th, 19th, 24th, and 26th Amendments all focused on expanding voting rights in the United States.
Explanation:
The 15th, 19th, 24th, and 26th Amendments all share a common theme of expanding voting rights in the United States. The 15th Amendment granted the right to vote regardless of race, the 19th Amendment extended this right to women, the 24th Amendment abolished poll taxes as a requirement to vote, and the 26th Amendment lowered the voting age to 18.
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