The answer is who because whom is not really saying what she is wondering
1. His collection of paintings ARE valuable and rare.
2. The flight of the stair to the temple IS under repair.
3. The internet PROVIDES a wealth of information for the users.
4. A fleet of antique cars PASS by the road every Sunday morning.
5. This string of pearls COSTS a lot of money.
Answer:
The answer is C. Johnny tells Dallas to leave Cherry alone.
