D Question 2 0.5 pts If you are building a forecasting model of the SPSOO [main US equity market]. what would be the most appropriate basis functions to simulate the particular effects of the 1'??? Asian crisis, the credit crisis of 2008. and the Covicl crisis of 2020? 0 Original data without transformation 0 Fourier transforms {3 Step functions {3 None of the other options C} Polynomial functions