Assuming the following array grades: import numpy as np grades = ([[87, 96, 70], [100, 87, 90], ​ [94, 77, 90], [100, 81, 82]]) Which of the following statements a), b) or c) is false? To select multiple sequential rows, use slice notation, as in grades[0:2] and to select multiple non-sequential rows, use a list of row indices, as in grades[[1, 3]] The following code selects an element in grades by specifying a tuple containing the element's row and column indices in square brackets: grades[0, 1] To select a single row, specify only one index in square brackets, as in grades[1] All of the above statements are true.