Which of the following best describes the process of bone resorption in bone remodeling?

Which of the following best describes the process of bone resorption in bone remodeling?

a) acids and enzymes released by osteoclasts degrade collagen and dissolve away minerals, which diffuse through the interstitial fluid into nearby blood capillaries
b) sex hormones stimulates osteoblast activity during growth spurts
c) osteoblasts secrete the extracellular matrix of bone
d) osteocytes die and no longer maintain the nutrients needed to preserve the extracellular matrix
e) the kidneys increase the rate at which calcium is excreted in urine