The Patient Had Tympanostomy Tubes Placed Bilaterally

The patient had tympanostomy tubes placed bilaterally. Which is the correct breakdown and definition of the term bilateral?

A) bi (one) + later (out to the side) + al (condition) = condition one side
B) bi (side) + later (toward the middle) + al (condition) = condition toward the middle of the side
C) bi (side) + later (toward the side) + al (pertaining to) = pertaining to toward the side
D) bi (two) + later (side) + al (pertaining to) = pertaining to two sides
E) bi (two) + lateral (toward the middle) = towards the middle of both ears