Which of the following statements about vitamin B-12 deficiency are true? (Check all that apply.)

As people age, they become more likely to develop vitamin B-12 deficiency than when they were young adults.

People are likely to develop a vitamin B-12 deficiency when their stomach doesn't produce intrinsic factor.

People who have porous weak bones are likely to develop a vitamin B-12 deficiency as a result

Megaloblasts are a sign of vitamin B-12 deficiency.

Beriberi is the condition that results from a vitamin B-12 deficiency.