The forecasting time horizon that would typically be easiest to predict for would be the A. long range. B. medium range. C. intermediate range. D. short range.

 D) Short range.

Explanation:

Short range time range for forecasting about the future plan is easy prediction method as it ranges near about 3 months. It depicts most accurate results for planning as facts and data are the source to make predictions.

Other options are incorrect because medium range, long range and intermediate range cannot be predicted easily as they consider longer time duration in comparison with short range.Thus, forecasting becomes easy for short-range.So,the correct option is option(D).

i think it is the third one.