Aresearcher is interested in finding out if the amount of amylase, a digestive enzyme found in saliva responsible for digesting starch, varies from person to person. which of the following would be the best way to test this?
take consistent amounts of saliva samples from a number of people whose meal times vary and measure the quantity of amylase in each sample.

take consistent amounts of saliva samples from a number of people who have not eaten in 8 hours and measure the quantity of amylase in each sample.

take varying amounts of saliva samples from a number of people whose meal times vary and measure the quantity of amylase in each sample.

take varying amounts of saliva samples from a number of people who have not eaten in 8 hours and measure the quantity of amylase in each sample.