PS Is an 87-Year-Old Male Admitted to a Hospital for Stomach

PS is an 87-year-old male admitted to a hospital for stomach pain. He has mild breathing problems and complains of fatigue and chronic stomach upset, for which he takes a daily antacid. While hospitalized, a physician has determined that PS has megaloblastic anemia.
-If the MD were to prescribe folate for PS, which of the following is a potential concern?

A) Folate could mask a B₁₂deficiency.
B) Folate is very expensive and hard to find.
C) Folate is a blood thinner.
D) Folate negatively interacts with his iron supplement.
E) Folate could promote the growth of H . pylori .