Western Asia the Tigris River flows into the Euphrates by the way
Dendrochronology is a method of dating based on the analysis of patterns of tree rings(also known as growth rings) hope this help!!! :)
The American attitude shifted in favor of rights for Native Americans. This is based on "Polls showed that Americans believed in rights for Native Americans". Why it's not A is because it wasn't the polling that contributed to the act, but what the polls showed which is C.