From this sign, driving at a minimum of 30 kilometers per hour...

A)Is recommended.
B)Is prohibited.
C)Is mandatory.Correct
# Explanation: Mandatory Minimum Speed
The minimum speed sign is a **binding order** that requires all drivers to maintain that speed as a minimum. It is not a recommendation, but a legal obligation that must be complied with. Driving below the signposted minimum speed constitutes a traffic violation.