Starting with the Major Premise, "If the Heater Is Turned

Multiple Choice

Starting with the major premise, "If the heater is turned on, then the house will get warm," which of the following completed arguments commits the fallacy of
affirming the consequent?

A) The heater is turned on so the house is warm.
B) No one turned the heater on so the house must be cold.
C) The house is warm so someone must have turned on the heater.
D) The house is cold, so we know that no one turned on the heater.