Sometimes its impossible to determine a models overall effectiveness due to the A. lack of funding and resources available to researchers B. imprecise nature of the landscape C. fact that the majority of researchers tend to be lazy D. poor craftsmanship used when creating the models

A. lack of funding and resources available to researchers

Explanation:

Predictive analytics also known as Predictive modelling is the act of using data and mathematical resources available, to determine the  outcome of future events. Modelling helps an organization or individual, be on top of his game in business, while competing with others, as well as have a good forecast of future events. The data obtained is made to align with the model, and then run with a computer program to give a proper analysis.

Modelling requires a lot of resources and investment. Therefore, determining the overall effectiveness of a model could be challenging because of limited funding and resources.

b. related objects

explanation:

data is stored in related objects in an access database.

the answer to your question would be something called hertz. the unit of measurement called a hertz, which is one cycle per second, is used to measure clock speed. within one cycle, your computer processes, refreshes, or updates itself to the changes that it is going through. in the case of computer clock speed, one hertz equals one tick per second. the clock speed of computers is usually measured in megahertz (mhz) or gigahertz (ghz)