An instrument with air as fluid was involved in some experiment( specific volume was the characteristic property utilized) which was conducted during day in desert. Due to some reason experiment couldn t be conducted during day and had to be conducted during night. However there were considerable errors in obtained values. What might be the reason of these errors?

• A. It was human error
• B. It was instrumental error
• C. Error was due to the fact that experiment was conducted at night
• D. None of the mentioned