Final answer:
The best revision for formal style in the given sentence is changing "it's" to "it is," as it enhances formality and maintains a professional tone suitable for the film industry context.
Step-by-step explanation:
When revising a sentence to fit a more formal style, especially for a career-oriented context, it is beneficial to use language that is precise, professional, and adheres to convention.
Therefore, transforming informal expressions into their formal counterparts is key. For the sentence in question, the best revision would be changing "it's" to "it is," which enhances the formality of the statement. This change ensures that the sentence maintains a professional tone that is often expected in written communications within the film industry.
Terms like "undertake" and "investigate" are already formal, while alternatives such as "go for" and "check out" are more casual and would not be appropriate in this context. Similarly, replacing "job" with "gig" would decrease the formality. Therefore, the correct option to make the sentence more formal is changing "it's" to "it is".