What caused the land bridge to form between asia and north america at the end of the last ice age?

Throughout united states history, new groups of people have been given voting rights. this usually occurs through

The primary purpose of a certificate of confidentiality is to: allow law enforcement to investigate abuse cases.protect researchers from disclosing conflicts of interest.prevent subjects from knowing the purpose of a study.protect identifiable research information from compelled disclosure.

What is the difference between one’s motive and one’s intent to commit a crime, and which is the most important in our legal system?