Which of the following statements is true about the floral regions of the Earth?

I- The Alicantino-Murciano sector includes the central and southern parts of Alicante and the provinces of Murcia and part of Almería.
II- The Ayorano-villenense sector includes the western lands of the Setabense sector.
III- The Alcoyano-diánico sector includes the eastern lands of the Setabense sector.
IV- The Valenciano-Tarraconense sector includes the Catalan coast and the north of the Valencian Community.
a) Only statements I and III are true.
b) Only statements II and IV are true.
c) Only statements I and IV are true.
d) Only statements II and III are true.