The response gives a clear overview of the changing rankings and selects key figures and turning points for all three manufacturers. However, the overview calls a gain in market share an increase in sales, and the early Sony Ericsson trend could be described more precisely.
8.0Ideas progress logically from overview to start values to decade trends, with cohesive devices such as 'conversely' and 'over the following ten years' used naturally.
8.0Vocabulary is flexible for describing trends, including "soaring to a peak" and "general decline". Precision is less consistent in "increase in sales" and the broad phrase "fortunes changed dramatically", where the measured variable should be named directly.
8.0GRAGrammatical Range and Accuracy
The response uses complex sentences, contrast with "while", and participial clauses with strong control. Errors are rare, although "between 10-15%" should use the paired construction "between 10% and 15%".
8.0