According to Krashen, what impact do negative emotions like fear, stress, or low confidence have on the Affective Filter?
AThey lower the filter, making language learning easier and more efficient.
BThey have no significant impact on the filter's function.
CThey raise the filter, creating a barrier that makes it harder for language input to reach the language acquisition device.
DThey activate the 'monitor' system, enhancing self-correction.