Of the Following Results of Studies Undertaken, Which Is Considered

Of the following results of studies undertaken, which is considered to have been a Type II error?

A) A study of the use of silver nitrate dressings versus the use of acupuncture demonstrated equal healing times for the treatment of leg ulcers within the elderly community. The researchers concluded that both types of treatment were equally effective.
B) A study of sleep behaviour showed that there is a relationship between raised body temperature and the number of hours of sleep. The conclusion drawn was that a person would sleep more if they had a high body temperature.
C) In a study of children's reading habits at home, a relationship between reading and eating bananas was found. The conclusion was drawn that eating bananas improved reading ability.
D) Following the discovery that a person's pain threshold increases when subjected to repeated electrical stimulation, researchers concluded that shock therapy is recommended for pain control.