Respuesta :
The scientist that helped to colleague for doing a good experiment when the expensive tool or instrument should be shared.
What is an experiment?
An experiment refer to the procedure where it should be carried out for supporting or refuting a hypothesis. It provides the cause and effect relationship by represent the result that arise at the time when the specific factor should be changed.
And, when the expensive tool cost should be shared so the more good experiment should be conducted.
hence, the option d is correct and the rest options should be incorrect.
Learn more about experiment here: https://brainly.com/question/20510182