A cruise ship owned by Ocean Tours Inc. discharges some of the oil used in its engines into Puget Sound and onto the shore. Under the Oil Pollution Act, this is most likely

a$.$

not a violation because a ship$$s engine is not a point source.

b$.$

a violation.

c$.$

not a violation because this type of discharge is not pollution.

d$.$

not a violation because a cruise ship is not a stationary source.