Was quarantined and missed this whole lesson can anyone help me?

Of the ones listed here, the factor that had the greatest impact on the eventual destruction of native americans' ways of life was the development of the a) automobile. b) highway. c) railroad. d) steamboat.

What is the area of a triangle with vertices at (-3 3) (-3,2) and (1,2)?

Which answer goes into the box? (90° clockwise rotation, 90° counter clockwise rotation, translation, or glide reflection)