I. The Reserve Bank of India has decided to lower the bank

I. The Reserve Bank of India has decided to lower the bank interest rates.
II. The Prime minister rolled out the red carpet for foreign investors, assuring them of all help.

1. If statement I is the cause and statement II is its effect
2. If statement II is the cause and statement I is its effect
3. If both the statements I and II are independent causes.
4. If both the statements I and II are effects of independent causes.
5. If both the statements I and II are effects of some common cause.

The common cause here is the stimulation of the economy.