The correct answer is (c) Antecedent Valley.
An antecedent valley is a valley that was formed by erosion before the land was uplifted. Death Valley is an example of an antecedent valley because it was formed by the erosion of the Colorado River before the land was uplifted to form the Sierra Nevada mountains.
An anticlinal valley is a valley that is formed when an anticline, or upward fold in the Earth’s crust, is eroded. A synclinal valley is a valley that is formed when a syncline, or downward fold in the Earth’s crust, is eroded. A rift valley is a valley that is formed when the Earth’s crust is pulled apart, creating a linear depression.