Question

for most of the 1900s, the legal voting age was
16
18
21
24

Explanation:

Historically, for most of the 1900s, the legal voting age in many countries (including the US before the 26th Amendment) was 21. The 26th Amendment later lowered it to 18, but for most of the century, 21 was the standard voting age.

Answer:

C. 21 (assuming the options are labeled A:16, B:18, C:21, D:24)