One of the most common causes of fires in the home and workplace is:
a. all of the aboveb. arsonc. candled. faulty electricity

D. Faulty Electricity.

Explanation:

Option A looks enticing ,which is all of the above.But mind you the question is asking  about the most common causes of fires in the home and workplace.

A balance should be given in this scenario.The major differences and the word Common a used between an office and a home should guide us in  choosing the best option.

An Arson is a deliberate setting on fire properties.The word deliberate makes the option wrong in this case,as it is not a common causes of fire.

Candle are hardly used in office working arena,and more over working hours are usually during the day.That also makes that option wrong.

Option D talks of faulty electricity which is common in office and home and a surge in power can result to fire outbreak .For that reason our right answer is D

i do not get the question.