Two friends are both general practitioners (GPs) and have separate practices, GP 1 is based in Melbourne and GP 2 in Sydney. They both share an interest in hay fever. They both decide to count the number of new cases of asthma they see in their clinics over a period of six months. Based on the information provided and the graph above, which of the following statements is true?单项选择题

题目图片
A

Melbourne showed a consistent increase in incidence rates of new hay fever cases over the 6-month period, while Sydney's cases fluctuated.

B

Differences in the overall incidence of new cases of hay fever between Melbourne and Sydney cannot be determined

C

Sydney had a higher incidence rate of hay fever than Melbourne in the 6 months the study was conducted

D

The graph shows that environmental factors could be influencing hay fever incidence rates differently in Melbourne and Sydney.

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