ACCorDing to thE Author, mAny tEEnAgErs think thEy ArE BrAvE Enough to ACt on thEir own, But, in FACt, most oF thEm ______.
A．hAvE muCh DiFFiCulty unDErstAnDing EACh othEr
B．lACk ConFiDEnCE
C．DArE not CopE with proBlEms singlE-hAnDED
D．ArE vEry muCh AFrAiD oF gEtting lost