For his research study, dr. safar wants to make sure that his sample is a representative one. the most effective way for him to do this is to

The marshall plan was designed to europe rebuild after wwii

Prioritizing is the answer

The earth's inner core is the earth's innermost part. it is primarily a solid ball with a radius of about 1,220 km (760 miles), which is about 70% of the moon's radius.[1][2] it is composed of an iron–nickel alloy and some light elements. the temperature at the inner core's surface is approximately 5,700 k (5,430 °c), which is about the temperature at the surface of the sun.