关于“该图表明导电率呈下降趋势。”一句的两种英文表达: ①The graph indicates there is a downward trend of the conductivity. ②The graph indicates a downward trend of the conductivity. 以下说法正确的是________。
A、①正确,②错误 
B、①错误,②正确  
C、①正确,②更好