You are observing a cross section of a young soybean plant stem after it has been stained with Toludine Biue O(TBO) stain. You observe a tissue type that har celis with thick walls that are stained pinkich-purple. Thls tissue type is occuming close to the outside perimeter of the plant stem. Based on these observations you conclude that this tissue type is:____________
a. parenchina
b. collenthises
c. bchiertinctvina
d. phoem