a student is revising the sentence below:

a younger associate may be able to fill in for mr. sully in a pinch, but i'm worried that a substitute may not possess the same business expertise that he does.

based on the context of this sentence, which is the best synonym for expertise? (4 points)

sanity: soundness of mind

wisdom: collected knowledge

brilliance: exceptional intelligence

comprehension: understanding; perception

If you had a chance to change the past would you? why or why not?

However, the idea of real-life people living in what would become the united states for thousands of years before columbus ever left spain never dawned on me. what would be the best way to revise this sentence for greater clarity? a) however, the fact that columbus left spain thousands of years after people settled what would become the united states never dawned on me. b) it never dawned on me, however, the idea of real-life people living in what would become the united states for thousands of years before columbus ever left spain. c) however, the fact that people were already living in what would become the united states for thousands of years before columbus ever left spain never dawned on me. d) however, the idea never dawned on me that long before columbus ever left spain, real-life people lived for thousands of years in what would become the united states.

Read the hypothesis below and answer the question that follows. playing video games will improve individual spatial skills. what is the dependent variable in the experiment? a. playing video games b. type of subjects c. type of video game d. spatial skills