What is the primary technique for determining the absolute age of a rock

The answer is; radiometric dating

This technique relies on naturally occurring radioactive elements in the rocks. The techniques calculate the amount of the ‘parent’ radioactive elements and compare it to the amount of the elements that are products of the element’s decay-‘daughter elements’.  The higher the number of products of decay, the older the absolute age of the rock layer will be. The half-life of the radioactive element must also be known for the age of the rock to be postulated.

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.