As Output Expands from 199 to 200 Units,total Costs Rise

Multiple Choice

As output expands from 199 to 200 units,total costs rise from $2,985 to $3,000.At this stage,the marginal cost and average cost of production are

A) $1 and $200.
B) $15 and $15.
C) $29.85 and $15.00
D) $1.