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You are given a numeric vector named dat that contains at least 3 elements and no missing values. Which of the following represents a correct way of computing the smallest among the elements of dat, excluding the first and last elements? A min(dat) @dmin(dat [.c (1, B. length (dat)))) c min (dat12, length (dat) 1) o min (dat (2, length (dat) -1)) OC. OD