According the to Science of Learning web module, which is correct? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Fluency of re-reading provides a good rough estimate of how well you have learned the studied material. b Test performance is determined by total study time rather than spacing of the allotted time. c Both input and output of information to and from the brain is necessary for long-term recall. d Interleaving refers to mixing study and break periods throughout a schedule