Answer:
O the Children's Bureau.
Step-by-step explanation:
The Children's Bureau was a reform bill signed by President William Howard Taft on April 9, 1912. This Bureau would become the first government office to concentrate solely on the well-being of mothers and children.
This social reform bill was first proposed and discussed during the Presidency of Theodore Roosevelt and then signed into a bill by President Taft. It advocated for the welfare of children and their mothers, dealing with issues ranging from abuse and neglect to any form of discriminating acts against children and mothers. It would later become an integral part of the Department of Health and Human Services.
Thus, the correct answer is the first option.