To explore the dose-response relationship of a new medicine, k dosages of the medicine (variable X) are fixed by the researcher in advance. The response (variable Y) is a continuous variable. The researcher got 0.86 by the formula of linear correlation coefficient between X and Y. Which of the following statements is correct?

A、We cannot say there is a positively linear correlation between X and Y unless the hypothesis testing is conducted.;
B、We can conclude that there is a positively linear correlation between X and Y based on the sign of the correlation coefficient.;
C、The choice of linear correlation analysis is unreasonable as X is not a random variable.;
D、We can conclude that there is a strong linear correlation between X and Y based on the absolute value of the correlation coefficient.;
E、We can say there is a positively strong linear correlation between X and Y.