3. A bus and a car left a place at the same time traveling in opposite direction. After 2 hours, the distance between them is at most 260 km. If x represents the speed of the bus and y represents the speed of the car. If the car travels at a speed of 60 km/hour, what could be the "best" rate the bus is moving?

a. at most 70 km/hour
b. at least 60 km/hour
c. not less than 70 km/hour
d. exactly 60 km/hour, as well



Please answer this properly
thank youuuu in advance ​