A The author intended to emphasize the words ‘determines’ and ‘context’ as they had been mentioned previously.
B The author italicized the word ‘determines’ to stress the idea of causation; the italics in ‘context’ substitutes for quotation marks.
C The words ‘determines’ and ‘context’ were italicized for emphasis since they represent ideas exposed by others, not the author himself.
D The italics in the term ‘context’ refers to a newly-coined term in LT methodology; the word ‘determines’ in italics reveals that Schmidt was too authoritative in choosing this term.
E Both words (‘determines’ and ‘context’) are terms employed by others and explained by the author of this text.