Choose the option that correctly changes the voice. **Someone has to clean the room before the guests arrive.**

Options:

• A: The room had to clean before the guests arrive.
• B: The room will have to clean before the guests arrive.
• C: The room has to be cleaned before the guests arrive.
• D: The room is to clean before the guests arrive.

Related Practice Questions:

• Why is copper considered highly pure and extensively used in religious rituals by Hindus today according to the historical context of natural resources?
• Which of the following regions is described by R.S. Sharma as "the most coveted and contested area" fought over by important ruling powers in northern India?
• Paper currency was not used in ancient India. In which century was paper currency finally introduced to India?
• The earliest agricultural settlements and states in ancient northern India were founded along the Himalayan foothills (the "terai" route) during which period?