Form a Valid Conclusion, Using All the Statements for Each

Multiple Choice

Form a valid conclusion, using all the statements for each argument. Give reasons. ​
If you learn mathematics, then you are intelligent.
If you are intelligent, then you understand politics.
​

A) If you learn mathematics, then you understand politics. (transitive)
B) If you learn mathematics, then you understand politics. (indirect)
C) If you don't learn mathematics, then you don't understand politics. (direct)
D) If you don't learn mathematics, then you don't understand politics. (indirect)
E) none of these