The correct answers are: 1) the painter using magnolia instead of white, and 5) the supplier who was late on his delivery. These are considered minor breaches because the contract was still fulfilled and it didn't affect the contract in any significant way. In this type of question you have to use logic to deduce the right answer; 2) A consultant giving bad advice would be a major breach - it would be a huge issue, particularly if that advice led to an accident or death. Think about an Architect advising on a type of pillar, and it turns out that pillar can't support the weight of the building. That would be bad. 3) Lions and Tigers are not the same thing - so that would be a pretty fundamental mistake in a contract. 4) Breaching a non-disclosure agreement is usually considered a major breach of a contract (this is mentioned in chapter 2.1). See p. 48 for more information on minor breaches.