In the word gastr/ectomy, the element "gastr/o" is considered the __________ __________

A sensitization is defined as:

A) an exaggerated response to a particular antigen. B) the cascade of events that occurs following activation by a foreign substance. C) the primary exposure of an individual to an antigen. D) the manifestation of severe, systemic effects of a histamine release.

Questions that can be answered with a "yes" or "no" are:

a. closed-ended b. open-ended c. closed-minded d. open-minded