True or false : High levels of oxygen allowed animals to be very small?

Im guesing B if im wrong im sowwy

Explanation:

Tejanos (Pronunciation: [teˈxano]; singular: Tejano/a; Spanish for "Texan") are the Hispanic residents of the state of Texas who are culturally descended from the original Spanish-speaking settlers of Tejas, Coahuila, and other northern Mexican states.

Their leader was a prominent rancher named Carlos de la Garza, whose land on the lower San Antonio River had been in the family for four generations. De la Garza and his men had to align themselves with a man they hated, Santa Anna.

Slavery was against Mexican law, but Americans brought slaves to Texas. Many American settlers and Tejanos, or Mexicans who lived in Texas, wanted to break away from Mexico. They did not like laws made by Santa Anna, Mexico's president. The Tejanos and Texans decided to fight for independence.

Texas Mexicans held tenaciously to their own brand of Catholicism, which they had forged for their particular needs. Specifically, Tejanos used their Catholicism to palliate their social subordination and affirm their cultural identity