A Duct from a Furnace Forks into Two Ducts

Multiple Choice

A duct from a furnace forks into two ducts. The air coming into the two ducts two ducts was 2,800 cubic feet per minute. If the one duct took 400 cubic feet per minute more than the other duct, what was the flow in cubic feet per minute (cu ft/min) in each duct?

A) The flow is 1,100 cu ft/min in the first duct,
The flow is 1,900 cu ft/min in the second duct.
B) The flow is 1,900 cu ft/min in the first duct,
The flow is 900 cu ft/min in the second duct.
C) The flow is 1,600 cu ft/min in the first duct,
The flow is 1,200 cu ft/min in the second duct.
D) The flow is 1,700 cu ft/min in the first duct,
The flow is 1,100 cu ft/min in the second duct.
E) The flow is 1,550 cu ft/min in the first duct,
The flow is 1,250 cu ft/min in the second duct.