The correct answer is option B, that is, a dentist surveying patients about toothpaste preference.
Convenience sampling refers to the non-probability technique of sampling where the subjects are chosen due to their suitable availability and propinquity to the researcher. This type of sampling method is dependent upon the collection of data from the members of the population who are conveniently accessible to take part in the study.
The cramps occur when muscle cells respire anaerobically. The partial breakdown of glucose produces lactic acid. The accumulation of lactic acid causes muscle cramps.
