In order to rule out intestinal parasites, especially protozoa, the recommendation is to collect _____.

(a) The first stool in the morning for 3 consecutive days
(b) A minimum of 3 stool samples, each sample collected at least 2 days after the previous
(c) At least 3 stools after administration of a barium enema
(d) A minimum of 3 stools after administration of an antibiotic such as tetracycline