a The application was much easier to use on the blackberry because its application had a very clear help menu.
b The application was much easier to use on the blackberry because the application had a very clear help menu.
c The application was much easier to use on the blackberry, the application of which had a very clear help menu.
d The application was much easier to use on the blackberry, whose application had a very clear help menu.
e The application was much easier to use on the blackberry, on which the application had a very clear help menu.
Cheers,
Eng
Top answer
'Blackberry' should be capitalized. All seem grammatically correct, though E is certainly the most awkward, with C not far behind it. A, B and D all seem fine to me.
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'Blackberry' should be capitalized. All seem grammatically correct, though E is certainly the most awkward, with C not far behind it. A, B and D all seem fine to me. A and B make the reasoning more clear.