Prior to 2005, Why Were Endotracheal Tubes (ETTs) Without Cuffs

Prior to 2005, why were endotracheal tubes (ETTs) without cuffs routinely recommended for children less than 8 years of age?

A) Because some lung volumes are so small cuffs are unnecessary
B) Because in some infants the ETT creates a seal against the cricoid cartilage
C) Because less airway resistance develops without a cuff, promoting lower ventilation pressures
D) Because ETTs without cuffs enable pressure venting when an infant cries