Mariana __ muy contenta hoy. b. está a. es Please select the best answer from the choices provided A B

The best answer is B. "está".In this sentence, "Mariana está muy contenta hoy" translates to "Mariana is very happy today." The verb "estar" is used to describe temporary states or conditions, such as emotions or locations. Therefore, "está" is the correct choice to use in this context.