Why Has There Traditionally Been No Formal Division Along Party

Why has there traditionally been no formal division along party lines or a formal system of choosing floor leaders in the Texas legislature?

A) The powers of the presiding officers and the longtime Democratic-controlled system did not produce a leadership structure comparable to that of the U.S. Congress.
B) Though membership in the legislature includes Republicans and Democrats, the delegation of power has not been typically done in a partisan fashion.
C) Legislative rules concerning the appointing of floor leaders was removed in the early twentieth century to reduce partisanship.
D) The powers of the governor over the legislature and longtime Democratic-controlled system did not produce a leadership structure comparable to that of the U.S. Congress.
E) Though membership in the legislature includes Republicans and Democrats, the delegation of power has been left to the whim of the presiding officers, which varies greatly.