Consider the following method, which is intended to return the element of a 2-dimensional array that is closest in value to a specified number, val. /** @return the element of 2-dimensional array mat whose value is closest to val */ public double findclosest(double[][] mat, double val) { double answer = mat[0][0]; double mindiff = math. abs(answer - val); for (double[] row : mat) { for (double num : row) { if ( /* missing code */ ) { answer = num; mindiff = math. abs(num - val); } } } return answer; } which of the following could be used to replace /* missing code */ so that findclosest() will work as intended?