Answer: Here's my answer
Step-by-step explanation:
The effect of Elizabeth Cady Stanton's father moving his office into the family's home was that Stanton had increased opportunities to study law (Option b). With her father's office now located at home, Stanton had easier access to legal materials and resources, which allowed her to pursue her interest in studying law. This arrangement provided her with a convenient and supportive environment to further her knowledge and understanding in this field.
The other options mentioned, gaining a deeper understanding of women's rights (Option a), becoming more involved in household duties (Option c), and her father providing her with gender inequality resources (Option d), are not directly mentioned or implied in the given information about the effect of her father moving his office into the family's home. Therefore, the correct option is that Stanton had increased opportunities to study law.