Leisure Enterprise's Total Cost of Producing Speedboats Is Given by TC

Leisure Enterprise's total cost of producing speedboats is given by TC = 10Q³ - 4Q² + 25Q + 500.On the basis of this information,the marginal cost of producing the 25th speedboat is:

A) $1,700.
B) $6,050.
C) $18,575.
D) $18,775.
E) $19,075.