Individuals Suffering with GAD Have a Series of Information Processing

Individuals suffering with GAD have a series of information processing biases which appear to maintain hyper-vigilance for threat,create further sources for worry,and maintain anxiety.Which of the following are examples of such biases?

A) preferential allocation of attention to threatening stimuli and threatening information
B) expecting negative outcomes following predictive cues in classical conditioning studies
C) they resolve ambiguity by selecting the more negative or threatening interpretation of ambiguous information
D) all of the above