Asubstance registers a temperature change from 20°c to 40°c. what is the kelvin equivalent to the end temperature? a. 20 k c. 313 k b. 40 k d. 293 k

D

Kelvin is very simple to determine because you just need to add or subtract the Celsius measure from the magic number of 273, so in this case you would add 20 because the degrees Celsius increased by 20 degrees. 
273+20=293=D

Hope this helps brainliest please