For the following question, arrange the sentences A, B, C, and D between sentences 1 and 6 to form a logical sequence with sentence 1 and sentence 6 as the starting sentence and the concluding sentence respectively:
(1) Innovation is work.
(A) There are people who are clearly more talented innovators than the rest of us.
(B) It requires knowledge.
(C) It also requires great ingenuity.
(D) But that alone is not enough.
(6) And this is because they are able to imagine and conceive what we do not even consider possible.