solve

The house sales data set, house_df, includes the following variables. What statsmodels code estimates a model of sale price as a linear function of area and categorical variables for zipcode? O results = smf.ols('sale_price ~ area + C(zipcode)', data=house_df).fit() O results = smf.fit('sale_price ~ area + C(zipcode)', data=house_df).ols() O results = smf.ols('sale_price ~ area + dummies(zipcode)', data=house_df).fit() O results = smf.ols('sale_price ~ area + zipcode', data=house_df).fit()