Its actually C. hot and sunny. We are talking about tropical continental. The other answer the user put D. does not make sense when talking about a tropical area. The overall answer is C.
Siberia is extremely chilly in comparison with substantial land Russia, it has outstanding organic materials and oil. The southern coast of Siberia (South East) have excellent sort of wood for paper. For this reason most valuable to Russia and the republics because of expansion of industries and trade that has led to greater exploitation of the natural resources
hope this helps