Which indicates that maria has well-developed selective attention skills?
a. it takes a great deal of noise to get maria to notice that someone is talking to her.
b. it takes her a long time to complete a task that requires vigilance.
c. she can pay attention to two people talking at the same time.
d. she can pay attention to her teacher's voice while ignoring the voices of other students who are talking at the same time?

The development of simple stone tools by early hominids led to the ability to procure meat more efficiently. this in turn led to the change in diet that included larger amounts of protein. many scholars believe that this shift in diet was a significant part of how our ancient ancestors adapted so quickly to a varied set of environments, and thus were able to begin cultural development. this demonstrates the intimate connection between