Read the Following Excerpt from a Health Record: PLAN

Read the following excerpt from a health record: PLAN
I will begin a trial of antacid therapy along with recommended dietary adjustments.If he does not respond to treatment in 1 month, I will schedule him for an EGD.
What are the correct definition and translation for the procedure for which the patient will be scheduled, should he not respond to initial treatment within a month?

A) EGD = esophagogastroduodenoscopy: eso (in, inside) + phago (eat) + gastro (stomach) + duo (two) + deno (digestion) + scopy (procedure) = procedure for examining the efficacy of the digestional tract
B) EGD = esophagogastroduodenoscopy: eso (outside) + phago (eat) + gastro (stomach) + duo (two) + deno (digestion) + scopy (procedure) = procedure using ultrasound to watch the digestional tract
C) EGD = esophagogastroduodenoscopy: esophago (esophagus) + gastro (stomach) + duodeno (duodenum) + scopy (procedure) = procedure for looking inside the esophagus, stomach, and duodenum
D) EGD = esophagogastroduodenoscopy: esophago (esophagus) + gastro (stomach) + duodeno (digestion) + scopy (procedure) = procedure for looking inside the esophagus and stomach by digesting a probe
E) EGD = esophagogastroduodenoscopy: esophago (esophagus) + gastro (digestion) + duodeno (duodenum) + scopy (procedure) = procedure for looking inside the esophagus to observe the duodenum in the process of digestion