The writer is deciding where to insert a fair opposing view in an LSAT-style essay about whether a school should switch mostly to digital textbooks. The thesis is: The school should adopt digital textbooks gradually because updates and portability help students if loaner devices and print exceptions remain. The body will develop current materials that are easier to carry and loaner devices and print alternatives. The opposing view says that some students lack reliable devices or learn better from print. Which placement best protects paragraph unity and sets up rebuttal?