Weber's Law Suggests Which of the Following

Multiple Choice

Weber's law suggests which of the following?

A) A person can detect a 5-watt light on some days but not on other days.
B) A person can detect a 10-watt light better than a 5-watt light.
C) A person can detect a change from a 5-watt light to a 10-watt light better than a change from a 15-watt light to a 20-watt light.
D) A person can detect a change from a 15-watt light to a 20-watt light better than a change from a 5-watt light to a 10-watt light.