To work as a controller, Dane should ideally pursue higher education beyond his high school diploma. The typical path for a controller includes obtaining a bachelor's degree, usually in accounting, finance, or a related field. Depending on the specific job requirements and the level of responsibility he aims for, pursuing a master's degree (such as an MBA with a concentration in finance or accounting) may also be beneficial.
Given these considerations, the most appropriate option for Dane would be:
a bachelor’s degree, then a master’s degree