A change in the core would have the greatest effect on the convection currents in the mantle. Hope this helped!
It has caused them to both have different temperatures
Answer:
DC equals EC times AC all over BC
Explanation:
The parallel lines divide the segments proportionally, so you have ...
DC/AC = EC/BC
Multiplying by AC gives ...
DC = (EC·AC)/BC . . . . . . matches the 1st Choice