Answer:
a. computational tools
c. specific observations
Step-by-step explanation:
Economists and engineers are professionals who work with an imminent risk that their projects will go wrong. The problem with these professionals is that any mistake can cause huge losses and even millionaires, so these professionals need to rely on certain elements to estimate a possible risk and resolve that risk before it causes a design error and causes huge damage to the project. professional.
The elements that economists and engineers use to estimate a possible risk must be rational elements based on concrete things and calculations that enable the simulation of an accurate result. Among the options given in the question, the elements that best fit this concept are computational tools and specific observations.