b. 78
There are no accidentals before the penultimate octave in FE (→GE). However, since in those editions (except for GE3) the first half of the bar is written using an octave sign, one can consider the sharps before the 1st octave in the bar to be valid. In GE3, the notation does not feature an octave sign (like in our transcriptions), hence the missing accidentals are a manifest error. In EE, sharps were added before this octave; they were added also in FED.
Compare the passage in the sources»
category imprint: Interpretations within context; Differences between sources
issues: Annotations in teaching copies, EE revisions, Annotations in FED, Accidentals in different octaves, Errors in GE
notation: Pitch