Which item completes the chart?

In 1517, the spanish friar bartolomé de las casas, disturbed by the suffering which spanish conquistadores had wrought on the native populations of america, became an important advocate of

What type of sentence has at least one independent and one dependent clause

According to us supporters, which was a benefit of purchasing alaska? the territory would be a buffer to invasions from europe. the territory would provide a place for many americans to live. it would increase trade by improving access to the northern pacific. it would increase the united states’ power by creating a bond with russia.