As effort and exercise get more and more intense, muscle types are recruited in a very specific order. What is the order from least to most intense?

a. TIIa > TIIx > TI
b. TIIx > TI > TIIa
c. TIIa > TI > TIIx
d. TI > TIIx > TIIa
e. TI > TIIa > TIIx