On a Mercator chart, latitude is read from which scales, and longitude from which scales?

1. A. Latitude from the top and bottom scales; longitude from the side scales
2. ✓ Latitude from the side (left and right) scales; longitude from the top and bottom scalesCorrect
3. C. Both latitude and longitude from the side scales, differentiated by degree markings
4. D. Latitude from the bottom scale only; longitude from the left scale only