Step 1: Checking Conclusion I — All pilots can be cruise
- No statement prevents Pilots from being Cruise.
- Possibility conclusion follows.
Step 2: Checking Conclusion II — No boat is captain
- All boats are Stream, but no restriction between Boat and Captain.
- Hence, cannot conclude “No boat is captain.”
\[
\boxed{\text{Answer: (A) Only conclusion I is followed}}
\]