Although All Aspirin Tablets Contain the Same Active Ingredient,acetylsalicylic Acid,not

Multiple Choice

Although all aspirin tablets contain the same active ingredient,acetylsalicylic acid,not all aspirin tablets are the same.Which is not a possible reason for this difference?

A) They contain fillers and bonding agents that may vary,depending on the manufacturer.
B) Some may contain weak bases that act as buffers to reduce the natural acidity of the aspirin.
C) Some may be coated to keep them intact until they reach the intestine.
D) Some may contain the inactive optical isomer in the preparation.