John Is 60 Years Old and Has Been Experiencing Numbness

John is 60 years old and has been experiencing numbness in his hands for the past 3 months.His doctor suspects that John is not producing enough hydrochloric acid and intrinsic factor and encourages him to eat more foods containing vitamin B₁₂.What is wrong with this suggestion?

A) People missing intrinsic factor cannot digest foods containing vitamin B₁₂ and will develop diarrhea
B) Intrinsic factor is not associated with vitamin B₁₂ and eating more foods containing it would have no effect on John's health
C) It is improbable that a lack of hydrochloric acid production and intrinsic factor are associated with the numbness that John is experiencing
D) Because John has no intrinsic factor,he cannot efficiently utilize vitamin B₁₂ from natural sources and would need a vitamin B₁₂-fortified food or supplement