Active voice is when the subject performs the verb. The answer is 'Our puppies played at the cool new dog park' because the puppies are playing, while the rest of the verbs in the other choices are not being acted at by the subject.
The writers of Harlem Renaissance attempted to spread the word about beauty and richness of the work done by African Americans. In the 1920s, this took place, and America started recognizing the work done by African Americans. This movement laid the foundation of the Civil Rights movement.
My mom went to school at Mess High School.
The answer to your question is C