Choose the correct option:
$(1)$ $ANF$ is secreted when blood pressure decreases / blood pressure increases.
$(2)$ Renal pyramids are located in the renal cortex / renal medulla.

• A
  $(1)$ Blood pressure decreases,$(2)$ Renal cortex
• B
  $(1)$ Blood pressure increases,$(2)$ Renal medulla
• C
  $(1)$ Blood pressure decreases,$(2)$ Renal medulla
• D
  $(1)$ Blood pressure increases,$(2)$ Renal cortex