True because neither one of them got what they wanted and was both without things
First one; Reinforcement and second one; Biologically.
<em>Hope this helped! :)</em>
The research error described above is an example of selection bias.
Selection bias takes place when, from a population of interest, a group of individuals is selected in order to construct a sample but without a proper randomization. The result is a sample which is not representative of the underlying population.
According to the example, the target population of the research comprises all students but the sample only includes boys. Hence, selection has not been random because it followed a gender criteria, and the results obtained using it cannot be applicable to the whole population because they are affected by a selection bias.
The right answer is protein. Legumes are well known for their low fat content and high protein content
The common problem of the research investigating the massed vs. the distributed practice is the <u>lack </u><u>of a </u><u>retention </u><u>or </u><u>transfer test</u>.
The research which intends to investigates the massed refers to one that targets a large population at a time
The research which intends to investigates the distributed refers to one that target the different section of the large population
However, the common limitation of the two research is lack of a retention or transfer test in the investigation.
Therefore, the Option A is correct.
Learn more about this here
<em>brainly.com/question/25583757</em>