In year one, Adam earns $\$ 1,000$ and saves $\$ 100 .$ In year 2 Adam gets a $\$ 500$ raise so that he earns a total of $\$ 1,500 .$ Out of that $\$ 1,500,$ he saves $\$ 200 .$ What is $\triangle$ dam's MPC out of his $\$ 500$ raise?
a. 0.50
b. 0.75
c. 0.80
d. 1.00