Hi,
The real estate baron Donald Trump presented a comprehensive introduction to advanced negotiations designed for graduate students in a two-year course.Vercules
B)For graduate students, the real estate baron Donald Trump presented a two-year course, being a comprehensive introduction to advanced negotiations.
Wrong, change of meaning [Trump didn't present a two-year course but a comprehensive introduction ...
Vercules
C)A comprehensive introduction was in a two-year course by the real estate baron Donald Trump presenting to graduate students an introduction to advanced negotiations
Wrong, too wordy, too long, introduction is redundant and always prefer active over passive form when possible
Vercules
D)In a two year course designed for graduate students, the real estate baron Donald Trump presented a comprehensive introduction to advanced negotiations.
Wrong, change of meaning [the introduction to advanced negotiations was presented for graduate students ; here it is ambigous because it can be infered that the presentation was presented for even people not from graduate students] Moreover, designed here modifies two year course whereas it should modifiy negotiations
Vercules
E)Presenting a comprehensive introduction, the real estate baron Donald Trump introduced advanced negotiations in a two-year course designed for graduate students.
Wrong, change of meaning [Trump presented a comprehsensive introduction to advanced negotiations ; he didn't introduce it while presenting ] and again designed should modify negotiations
So, we are left with A