The Table Below Shows the Monthly Income of a Family

The table below shows the monthly income of a family and the fuel assistance received from the government. Table 19.4

-Refer to Table 19.4.What is the marginal penalty on working (in terms of reduced fuel assistance) borne by the family when its income rises from $200 to $300?

A) $40
B) $50
C) $80
D) $60
E) $100