Which of these statements correctly describe terrigenous sediment sources for the paleoSouthwest during the Early to Middle Paleozoic Era, as revealed by DZ studies? Select all correct responses. a. Sediments were sourced from the Appalachian and Ellesmere orogens in the Middle Paleozoic Era. b. In the Middle Paleozoic Era, the Transcontinental Highlands were still a major sediment source. c. Sediments were carried by glaciers in the Early Paleozoic Era. d. Sediments were mostly sourced from the Transcontinental Highlands in the Early Paleozoic Era. e. Sediment sources became increasingly distal as the Paleozoic Era progressed. f. Sediments were carried by rivers and longshore transport in the Middle Paleozoic Era.