In the RF optimization process, if found that UE transmit power is high but the uplink coverage is still weak, which of the following adjustment methods is not available?

In the RF optimization process, if found that UE transmit power is high but the uplink coverage is still weak, which of the following adjustment methods is not available?
A . Adjust the antenna azimuth and downtilt angle
B. Increase Tower Mounted Amplifier
C. Adjust power control related parameters
D. Troubleshooting uplink interference

Answer: C