It is estimated that t years from now the circulation of a local newspaper will be C=1202 +380t+ 5500. At what rate will the circulation be changing with respect to time 7 years from now? Will the circulation be increasing or decreasing at that time? Select one: A. increasing at a rate of 1220 newspapers per year B. decreasing at a rate of 1220 newspapers per year C. increasing at a rate of 2060 newspapers per year D. decreasing at a rate of 2060 newspapers per year