Read the information given below and answer the question that follow.
- A causes B or C, but not both.
- F occurs only if B occurs
- D occurs if B or C occurs
- E occurs only if C occurs
- J occurs only if E and F occurs.
- D causes G or H or both
- H occurs if E occurs
- G occurs if F occurs
If A occurs, which may occur?
- F and G
- E and H
- D
- I only
- II only
- III only
- Either $1$ and III or II and III, but not both