Which option fits best for the following question.
Unfortunately this model ..... to be the most unpopular the company had ever produced.
A.Developed
B.Marketed
C.Turned
D.Proved
For me the option C looks fine but the answer is D.Is the given answer correct? Prove reminds me of scientific theories whereas something can turn to be in unexpected end.
and how about
Unfortunately this model turn out to be the most unpopular the company had ever produced
Is this sentence sound ok?