Select the best answer for the question 6.) Lamb's-quarter weed is a common weed that inhibits the growth of corn. In a study, corn was planted at the same rate across 16 plots of land, and then the plots were weeded at different rates to allow a specific number of weeds to grow. No weeds other than lamb's-quarter were allowed to grow at all. The study aimed to see how much corn yield was affected by the presence of increased number of lamb's- quarter weeds per meter. When the study is finished, the data is found to have a moderately strong negative correlation of -0.72. Calculate the value of the variance.
O A. 72%
O B. 100%
O C. 51.8%
O D. 28%