Top Law Schools

I'm currently doing preptests to prepare for the October LSAT and have gotten frustrated on this particular question. Any help would be appreciated.

Game:
Each of six people - K, L, M, O, P, and S - plays exactly one of two sports - golf and tennis. If a sport is played by more than one of the six people, then the people who play that sport are ranked in order of ability from highest to lowest, with no ties. The following conditions must apply:
O plays tennis
L plays golf
there is no golf player ranked higher than L
If M plays golf, then P and S play golf, P ranking lower than M but higher than S
If M plays tennis, then S plays tennis, S ranking lower than O but higher than M
If P plays tennis, then K plays tennis, O ranking lower than K but higher than P

Q#14. Each of the following could be the lowest-ranking tennis player EXCEPT:
(A) S
(B) K
(C) O
(D) P
(E) M

The correct answer is (A). I don't see how that's possible. I went with (C).

The 4th rule clearly states that S could be ranked lowest. What don't I get???

My diagram looks like this:
(highest ranked on top, lowest on bottom)

L
M
P
S K/O
-- --
golf tennis

Obviously S is lowest ranked.

Well first things first, from the rules you set out RULE #4 refers to golf and the question refers to tennis. so...

nevermind...missed a key word yet again. thanks anyway