What combination of factors that Radcliffe displays are most likely to have increased his risk of pathological patterns of alcohol use? 

a. His fame and his talent 

b. His anxiety and his social isolation 

c. His shame and his choice of roles 

d. His creativity and his work schedule 

Radcliffe was fearful that a tabloid photographer would catch him displaying which category of substance-use disorder symptoms?

a. Tolerance 

b. Withdrawal 

c. Intoxication 

d. Dependence