One of the contributions of Theodore Roosevelt as President was

One of the contributions of Theodore Roosevelt as President was _________.
A、the banning of child labor
B、the giving of voting right to women
C、in the field of natural conservation
D、in urban system
【正确答案】：C
【题目解析】：西奥多·罗斯福作为总统的贡献之一是在自然保护领域。