The starting temperature was 0°C. Then it increased equally 4 times until it was warmer than 20°C. Which inequality expresses the number of degrees, d, by which the temperature could have increased each time?

4d<20
4 d less than 20

4d≥20
4 d greater-than-or-equal-to 20

4d>20
4 d greater than 20

4d≤20
4 d less-than-or-equal-to 20