30. Major grammatical errors of preschool children include all of the following except A. choosing the wrong vocabulary word
B. using negatives incorrectly
C. asking questions without inverted word order
D. making irregular verb forms regular

The answer is the second one

It has been an olympic event since 1972

Personality is a mixture of characteristics/qualities that form an individual's distinctive persona. it can be influenced by environmental and biological factors; one's culture is a most important factor that shape personality. extreme mood swings, unstable relationships, distorted self-image, impulsive/risky behavior, explosive anger, chronic feelings of sadness/emptiness, etc. these could indicate that someone could have a personality disorder.