The perseverance of the scientific research workers towards the target is prominently reflected in ().

A、alwaysleadingbyexampleandworkhardwhenparticipatinginscientificresearch
B、beingperseverance,optimismandopen-mindednesswhenfallingintoaresearchtrough
C、beingstillpersistentandstrugglinginthefaceofscientifichardships
D、remainingarrogant,humbleanddown-to-earthafterobtaininginnovativeresults