If successful, the research could / pave the way towards / the prevention in untimely deaths / due to fatal illnesses.
A. If successful, the research could
B. pave the way towards
C. the prevention in untimely deaths
D. due to fatal illnesses
E. No error
Answer: Option D
Better to say :...... prevention of (not in)
Also: illness can be a countable noun especially when we talking of different types as used here. So illnesses is correct
So after due to we cannot use plural forms. Is that correct?