Final answer:
An apprentice gas fitter licensed before September 1st, 2008 must complete 3400 work hours and 150 classroom hours over a period of no less than 2 years to apply for their journeyman's license.
Step-by-step explanation:
To apply for a journeyman's license, an apprentice gas fitter licensed before September 1st, 2008 must have completed a certain number of work hours and classroom hours. The correct answer is:
A. 3400 work hours and 150 classroom hours over a period of no less than 2 years.
This requirement was set to ensure that the apprentice has gained sufficient practical experience in the field as well as theoretical knowledge through classroom instruction prior to becoming a journeyman gas fitter.