GIVING 25 POINTS AND BRAINLIEST FOR CORRECT ANSWER Which of the following is the correct order of land forms and bodies of water early settlers heading westward toward California would have encountered as they migrated from East to West in the U. S. beginning on the East Coast of the USA?
a. Sierra Nevada Mts., Mississippi River, Rocky Mts. Appalachian Mts, Great Plains b. Appalachian Mts., Mississippi River, Great Plains, Rocky Mts., Sierra Nevada Mts. c. Appalachian Mts., Great Plains, Mississippi River, Sierra Nevada Mts., Rocky Mts. d. Sierra Nevada Mts., Mississippi River, Great Plains, Rocky Mts., Appalachian Mts.