I need help it is a multiple Choice question

Answer:
6 m
.006 km
6,000 mm
Step-by-step explanation:
Let's look at some conversions real quick:
1 cm --> 10 mm (multiply cm by 10)
1 cm --> 0.00001 km (divide cm by 100000)
1cm --> 0.01 m (divide cm by 100)
Now that this is laid out, lets do these conversions for 600 cm.
Meters (m) = 600/100 = 6 meters
Kilometers (km) = 600/100000 = .006km
Millimeters (mm) = 600 * 10 = 6,000 mm
I hope this helps!!
- Kay :)