72 year old Betty was told by her doctor that she has low bone mass and structural deterioration of bone tissue. Her bones look like they have a bunch of space or pores in them. The doctor explained that the patient has ____________________ and is more likely to fracture than someone else her age without this disease.

A. Osteoporosis

B. Osteoblastoma

C. Osteocytoma

D. Osteogenesis imperfecta