Which Statement Characterizes Vitamin B₁₂ Nutrition in Vegetarians and Vegans

Which statement characterizes vitamin B₁₂ nutrition in vegetarians and vegans?

A) Vitamin B₁₂ in fortified cereals has low bioavailability.
B) Vegan mothers need only infrequent intake of vitamin B₁₂-fortified cereals.
C) The vitamin B₁₂ in fermented soy products may be present in an inactive form
D) Infants born to vegan mothers are resistant to the development of vitamin B₁₂ deficiency.
E) Vitamin B₁₂ is problematic in vegetarians but not vegans.