What were the main animals that lived during the Mesozoic era?

I. The Mesozoic era was marked by the appearance of trees, flowering plants, and herbs similar to those of today.
II. The era was marked by the greatest development of reptiles, which disappeared suddenly at the end of the period.
III. The era was marked by the appearance of a small number of birds and mammals, evolved from reptiles in previous periods.
IV. The era was marked by the dominance of birds and mammals over the earth, with the majority of large reptiles having disappeared.
a) I and II are correct.
b) II and III are correct.
c) III and IV are correct.
d) I and IV are correct.