A psychologist is interested in how early childhood nutrition affects height. To research this subject he tracks the nutritional consumption and growth of the same group of infants from age 1 through age 6. This research technique is utilizing a design.

i think the answer is c

hope this

explanation:

daily refers to frequency, like weekly or monthly. take this medicine twice daily, once in the morning and again at bedtime. on a daily basis there refers to everyday life, to one's normal or usual behavior, activity, routine, or schedule, to the quotidien.