Sandra's boss asked her to work this weekend, but sandra feels obligated to attend a family reunion and she has to study for an exam. she is having trouble deciding which "activity" to let go. sandra is experiencing

The persian wars started when emperor darius i began an invasion of greece. what caused darius to decide to attack greece? a. greek pirates had raided persia's merchant ships and coastal towns. b. greek armies had attacked and taken over land that belonged to persia. c. greek city-states had supported rebellions in the persian empire. d. greek leaders had declared independence from the persian empire.