Which of the Following Is NOT True Concerning Antacids

Which of the following is NOT true concerning antacids?

A) They have a short duration of action.
B) Chronic use of antacids has no effect systemically.
C) Food increases antacid duration of action; therefore these medications are best given following meals.
D) They should be taken 7 times a day.
E) They come in suspensions that must be shaken prior to administration and tablets that should be thoroughly chewed followed by a glass of water.