Question

its the ability to hold and manipulate information in mind, over brief intervals. source: scientific american in this sentence, intervals means: questions or exercises evaluating skill or knowledge acts of drawing someones attention away from something definite lengths of time marked off by two instants starting points for new states or experiences

Explanation:

In the context of holding and manipulating information over "brief intervals", it refers to short - time periods, so the time - related definition is correct.

Answer:

C. definite lengths of time marked off by two instants