Put the events listed below in order of which happened first in Act 4 of Macbeth.
1 Macduff's son is killed, and his wife pursued
2 Eight kings appear with Banquo
3 Ross tells Macduff about his family
4 Lady Macduff complains to Ross
5 Apparition (bloody child)
6 Apparition (armored head)
7 Macbeth meets the witches again
8 Malcolm is suspicious of Macduff
9 Apparition (child with crown and tree)
10 A messenger warns Lady Macduff
a) 2, 7, 8, 5, 6, 9, 1, 4, 10, 3
b) 5, 6, 9, 2, 7, 8, 3, 4, 10, 1
c) 2, 5, 6, 7, 8, 9, 10, 1, 3, 4
d) 7, 8, 2, 5, 6, 9, 3, 10, 1, 4