不知道怎麼算出來的, 題目的意思也不太懂
Eight light bulbs numbered 1 through 8 are arranged in a circle as shown above. The bulbs are wired so that every third bulb, counting in a clockwise direction, flashes until all bulbs have flashed once. If the bulb numbered 1 flashed first, which numbered bulb will flash last?
(A) 2
(B) 3
(C) 4
(D) 6
(E) 7
