Simple columnar epithelium is composed of a single layer of __ $(A)$ __ cells. Whose nuclei are located at the __ $(B)$ __ . Choose the correct option $:-$

• A
  $(A) \rightarrow$ Short and flat,$(B) \rightarrow$ Center
• B
  $(A) \rightarrow$ Tall and slender,$(B) \rightarrow$ Base
• C
  $(A) \rightarrow$ Tall and slender,$(B) \rightarrow$ Center
• D
  $(A) \rightarrow$ Cubical,$(B) \rightarrow$ Center