What is the capital of washington

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.

Ab c or d ? i’m not sure what the answer is