Why do you think some countries choose to take over other countries

Whether or not a given study has the possibility of causing harm to participants:

Which sentences describes a cycle of dependency? a. aid harms the local economy creating the need for more aid. b. aid improves infrastructure and creates more wealth and more good infrastructure. c. aid programs become more reliable over time so people can depend on them. d. no answer is correct

The second westward surge reached the: mississippi river, appalachian mountains, oregon territory