Sea buckthorn (Hippophae), a plant that typically grows at high altitudes in Europe and Asia, has been found to have medicinal value. The medicinal properties of berries collected from sea buckthorn were investigated in Academia Journal of Medicinal Plants (Aug. 2013). The following variables were measured for each plant sampled. Identify each as producing quantitative or qualitative data.
a. Species of sea buckthorn (H. rhamnoides, H. gyantsensis, H. neurocarpa, H. tibetana, or H. salicifolia)
b. Altitude of collection location (meters)
c. Total flavonoid content in berries (milligrams per gram)