<h2>
answer:</h2>
a heterogeneous mixture
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explanation:</h2>
A heterogeneous mixture is commonly any mixture that is not uniform in combination - it's a non-uniform mixture of smaller fundamental particles. Using different means, the particles in the mixture can be separated from one another. In a heterogeneous mixture, the elements do not mix completely, and the individual items that form the mixture can be identified. Heterogeneous mixtures can typically be separated back into their original components by chemical or physical means.
Organisms that cause disease are carriers. Such as ticks, fleas, lice.
OBSERVATIONAL LEARNING is associated with the fearless peer experiment. The experiment demonstrates OBSERVING OTHERS AND POSITIVE BEHAVIORS.
Fearless peer experiment is about a video show about a small boy who was having fun playing with dogs. What was seen inside the video encourages the watchers to lose the fear they have for strange dogs.
<em>I think the answer is C, Hence I would pick the answer to be B because it sounds to be more information into the answer then A/B. Hope this helps, let me know if I am right. </em>