Which statements best describe how the author uses more than one structure to present information in “From Barter to Bitcoin”?

Select the two correct answers.

A) A chronological structure is used to trace the evolution of currency from past to present.

B) Problem-and-solution structure is used to explain why debit cards are most popular today.

C) The author uses comparison to show how the value of bitcoin can vary wildly.

D) The author contrasts different currencies to explain why some are worth more than others.