Researchers Measured the Length of the Central Retrix (R1), a Flight-Involved

Multiple Choice

Researchers measured the length of the central retrix (R1) , a flight-involved tail feather, in 21 female long-tailed finches. A boxplot of the length, in millimeters (mm) , is given here:
Based on this boxplot, which of the following statements is TRUE?

A) The distribution of R1 lengths is bimodal.
B) The distribution of R1 lengths has a high outlier.
C) In this study, 75% of the birds had an R1 length above 70 mm.
D) The mean R1 length is approximately 66.