According to the multidimensional integrative approach to psychopathology, the following statement is true for most psychological disorders:

a. if one monozygotic twin has a particular disorder, the other twin will definitely have the disorder as well
b. monozygotic twins are no more likely to share psychological disorders than any other siblings
c. monozygotic twins are no more likely to share disorders than any other two people selected at random from the population
d. if one monozygotic twin has a particular psychological disorder, the other twin is more likely to have the disorder than the rest of the population