What is a rule that applies to the two-phase locking protocol. a. two transaction cannot have conflicting lock. b. no unlock operation can precede a lock operation in a different transaction. c. no data is affected until all locks are released. d. no data is affected until the transaction is in its locked position

How does the author's discussion of schroeder's study contribute to the development of ideas about how children react to mistakes?

After graduating from college with a degree in education, matt found a teaching jobin saudi arabia. he figured that a teaching job in the middle east would be the same as a teaching job in the united states. while there were similarities between american and saudi schools, matt was unprepared for the differences between the two cultures. on the first day, a number of his students arrived later than the class's designated 10 a.m. starting time. later, during a break, he noted that his students seemed to stand closely to each other and to him when they spoke. after class, a confused matt asked the american director of the teaching program about these observations. that's why it's always important to do your homework! the director responded with a laugh. what is the possible explanation that director could gave him?

What does hedrick imply about other candidates in this excerpt? check all that apply. they are not true southerners. they have very diverse experiences. they are popular across the country. they do not understand the other regions. they are not well known in other countries.