Reading Comprehension (RC) | Re: Resin is a plant secretion that hardens when exposed to air; fossilize

3. The author refers to “bacterial infections” (see line 11) most likely in order to
(A) describe the physiological function that gum performs in plants -CORRECT. "Resin differs from both gum and sap in that scientists have not determined a physiological function for resin" -This line is followed by the line that defines the function of gum. Thus we can infer that "bacterial infections" is referring to the physiological function of gum
(B) demonstrate that sap is not the