Answer:
Originally apprenticeships involved young learners exchanging their tuition payments in return for formal classes from craft specialists.
Step-by-step explanation:
The blanks left in the sentence exposed in the question were filled with the words that allowed the sentence to be completed making it coherent and cohesive. This allows the reader to understand a concrete meaning and to understand the message that the sentence wishes to convey simply and objectively. In addition, the blanks were filled with words that establish a logic in the action that states that young apprentices exchanged tuition payments in exchange for formal classes by handicraft specialists.