In the country of Xania, periods of political instability are always

In the country of Xania, periods of political instability (X) are always accompanied by a volatile Xania stock market (A) and by volatility of Xania's currency compared to currencies of other countries (B). At the present time, Xania's currency is experiencing volatility. Hence, the Xania stock market must also be experiencing volatility.

The reasoning is.
If X, then A and B.
Conclusion: A is happening, so B must be happening.

What do we require to fill up the gap?
Any of the below.
1. Relation between A and B: If A, then B.
2. Relation between A and X: If A, then X.
This will convert into: A leads to X and X leads to A and B.

Which of the following allows the conclusion above to be properly drawn?

(A) Whenever Xania is politically stable, the Xania currency is stable as well.
This tells us : If not X, then not A.
This can be written as: If A, then X.
Exactly what we were looking for. A leads to X and X will further lead to B.

(B) Whenever the Xania currency is stable, Xania is politically stable as well.
This tells us : If not A, then not X.
This can be written as: If X, then A.
We already know this. Does not fill up the gap.

(C) Whenever the Xania stock market is unstable, Xania is politically unstable as well.
This tells us : If B, then X.
But we know nothing about X.

(D) Whenever the Xania stock market is unstable, the Xania currency is unstable as well.
This tells us : If B, then A.
This can be written as: If not A, then not B.
But we are looking for If A, then B.

(E) Whenever the Xania stock market is stable, the Xania currency is stable as well.
This tells us : If not B, then not A.
This can be written as: If A, then B.
Again fills up the gap.


Answer could be A or E.