The development of rice plantations in south carolina: a. required such large capital investments that carolina's planters never became as wealthy as those in the chesapeake region. b. used slaves from africa, who were partially immune to malaria. c. occurred only after the colony's planters unsuccessfully sought to cultivate tobacco, sugar cane, and indigo. d. is considered by most historians to be the most important cause of the yamasee war. e. would have proven impossible without the importation of thousands of european indentured servants to serve as a labor force.