Which option identifies the sampling technique represented in the following scenario? an ophthalmologist wishes to measure the rate of occurrence of glaucoma in patients that come to her eye clinic. each patient is assigned a number from 1 to 1,040. a random number generator is used to select a starting number. the selected number is 8. every tenth patient is then evaluated for glaucoma. in other words, patients 8, 18, 28, 38, 48, 58, 68, etc. were selected to complete the survey. a. cluster sampling b. stratified random sampling c. systematic random sampling d. mixed/multi-stage random sampling