What are the central problems of an economy?​

What was the direct cause of the u.s. entry into world war ii? a. the bombing of pearl harbor b. the invasion of poland by germany c. the capture of belgium by germany d. the battle of britain

Look at the graphic, which describes the steps of analyzing a writing prompt.which word best completes the graphic? a. formatb. thesisc. idead. directive

Which organelle is marked with an x?