An Elderly Patient Who Routinely Takes the Bulk-Forming Laxative Psyllium

An elderly patient who routinely takes the bulk-forming laxative psyllium (Metamucil) is counseled by the home health nurse that in order to prevent constipation and possible fecal impaction, this patient should be sure to take:

A) extra vitamin C.
B) a fat-soluble vitamin.
C) the medication with a large amount of fluid.
D) an over-the-counter antacid.