how they make their choices , and 
(ROOT (S (SBAR (WHADVP (WRB how)) (S (NP (PRP they)) (VP (VBP make) (NP (PRP$ their) (NNS choices))))) (, ,) (CC and)))
(ROOT (S (SBAR (WHADVP (WRB )) (S (NP (PRP )) (VP (VBP ) (NP (PRP$ ) (NNS ))))) (, ) (CC )))