by maryadkins Mon Jun 16, 2014 1:24 pm
Let's walk through this:
If M is in 1967, how many other people can go in 1968? Only I. So I is in 1968 (because everything else has someone that has to come after it).
We know H and N are both going to have to go before O, so in slots 1-4, but we don't know where (though they have to be in that order). G will come after them, but again, we don't know exactly where.
But wait...G has to come after FOUR people! (H, N, K, and J). That means the only spot still open for G is slot 6, because we need 4 slots before G that are not filled by O.
That means H - N, K - J all go in slots 1-4, but we don't know in what order outside of those pairings.
The answer is (B), we know 2 for sure: I, and G.
Hope this helps.